NXP Semiconductors PowerQUICC MPC8308_RDB User manual

©Micetek International Inc., 2009. All rights reserved.
Micetek International Inc.
User’s Guide
The MPC8308_RDB is a system featuring the
PowerQUICC™ processor, MPC8308. This low-cost,
high-performance system solution consists of a printed
circuit board (PCB) assembly plus a software board support
package (BSP) distributed in a CD image. This BSP enables
the fastest possible time-to-market for development or
integration of applications including printer engines,
broadband gateways, no-new-wires home adapters/access
points, and home automation boxes.
This document describes the hardware features of the board
including specifications, block diagram, connectors,
interfaces, and hardware straps. It also describes the board
settings and physical connections needed to boot the
MPC8308_RDB. Finally, it considers the software shipped
with the platform.
When you finish reading this document, you should:
• be familiar with the board layout
• understand the default board configuration and your
board configuration options
• know how to get started and boot the board
• know about the software and further documentation
that supports the board
Document Number: MPC8308RDBUG
Rev. 3, 03/2010
Contents
1 MPC8308_RDB Hardware . . . . . . . . . . . . . . . . . . . . . .3
2 Board-Level Functions . . . . . . . . . . . . . . . . . . . . . . . . .7
3 Connectors, Jumpers, Switches, and LEDs . . . . . . . . .19
4 MPC8308_RDB Board Configuration. . . . . . . . . . . . 26
5 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 MPC8308_RDB Software . . . . . . . . . . . . . . . . . . . . . .33
7 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
WARNING
This is a class A product. In a domestic
environment this product may cause radio
interference in which case the user may be
required to take adequate measures.
PowerQUICC™ MPC8308_RDB User’s
Guide

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
2Micetek International Inc.
Use this manual in conjunction with the following documents:
•MPC8308 PowerQUICC™ II Pro Integrated Communications Processor Family Reference
Manual (MPC8308RM)
•MPC8308 PowerQUICC II Pro Processor Hardware Specifications (MPC8308EC)
•Hardware and Layout Design Considerations for DDR Memory Interfaces (AN2582)
NOTE
The normal function of the product may be disturbed by strong
electromagnetic interference. If so, simply reset the product to resume
normal operation by following the instructions in the manual. If normal
function does not resume, use the product in another location.
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his/her own expense.

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
Micetek International Inc. 3
MPC8308_RDB Hardware
1 MPC8308_RDB Hardware
This section covers the features, block diagram, specifications, and mechanical data of the
MPC8308_RDB.
1.1 Features
• CPU: Freescale MPC8308 running at 400/133 MHz; CPU/coherent system bus (CSB)
• Memory subsystem:
— 128 MByte unbuffered DDR2 SDRAM discrete devices
— 8 MByte NOR flash single-chip memory
— 32 MByte NAND flash memory
— 256 Kbit M24256 serial EEPROM
• Interfaces:
— 10/100/1000 BaseT Ethernet ports:
– eTSEC1, RGMII: one 10/100/1000 BaseT RJ-45 interface using Realtek
™
RTL8211B
single port 10/100/1000 BaseT PHY
– eTSEC2, RGMII: five 10/100/1000 BaseT RJ-45 interfaces using Vitesse
™
VSC7385
5-port L2 Gigabit Ethernet switch
— USB 2.0 port:
– High-speed host/device/OTG USB interface using external ULPI PHY interface by SMSC
USB3300 USB PHY
— PCI Express:
– One mini PCI Express connector supporting half and full size mini PCI Express card
— eSDHC port:
– One SD card connector
— Dual UART ports:
– DUART interface: supports two UARTs up to 115200 bps for console display
— I2C
– I2C connected to Dallas
TM
DS1339 RTC with battery holder and Atmel
TM
AT24C08 Serial
EEPROM
• Freescale MC9S08QG8 MCU (20-MHz HCS08 CPU) for fan control and soft start
— Support for Low Power / Wake on LAN. This can be MCU controlled or logic
• Board Connectors:
— 4 pins Power Jack connector
— Dual RS-232C connectors
— JTAG / COP for debugging
— IEEE® Std. 1588™ signals for test and measurement
— 8 pins SPI header for future expansion
• Form factor:

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
4Micetek International Inc.
MPC8308_RDB Hardware
— Mini-ITX form factor (170 mm x 170 mm, or 6693 mils x 6693 mils)
• 6-layer PCB (4-layer signals, 2-layer power and ground) routing
• Certification
— CE (Class A) / FCC (Class A)
• Lead-Free (RoHS)
Figure 1 shows the MPC8308_RDB block diagram.
Figure 1. MPC8308_RDB Block Diagram
MPC8308
eTSEC2 Vitesse
L2 Switch
RGMII
ULPI SMSC
USB PHY
IEEE1588
eTSEC1 Realtek
PHY
Clock, pulse, etc.
USB
Dual
UART
USB
mini-AB
eSDHC SD card
System Clock
and USB Clock
128 Mbyte
DDR2
8 Mbyte
32-Bit DDR2
Bus
32 Mbyte 8/16-Bit Local
Bus
I
2
C Bus
Real-Time
Clock
Thermal
Sensor
GPIO
Header/
JTAG/COP
Header JTAG/COP
Power Supply
Header/
EEPROM
RGMII
IEEE1588 Test points
Clocks
PCIe
mini PCI
Express
Connector
Test points
SPI
Header
Vitesse
L2 Switch NAND Flash
NOR Flash

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
Micetek International Inc. 5
MPC8308_RDB Hardware
1.2 Specifications
Table 1 lists the specifications of the MPC8308_RDB.
Table 1. MPC8308_RDB Specifications
Characteristics Specifications
Power requirements (without add-on card): Typical Maximum
12 V DC 0.5 A
5.0 V DC 1.5 A
Communication processor MPC8308 running @ 400 MHz
Addressing: Total address range
Flash memory (local bus)
DDR2 SDRAM
4 Gbyte (32 address lines)
8 Mbyte with one chip-select
128 Mbyte DDR2 SDRAM
Operating temperature 0
o
C to 70
o
C
Storage temperature –25
o
C to 85
o
C
Relative humidity 5% to 90% (noncondensing)
PCB dimensions:
Length
Width
Thickness
6693 mil
6693 mil
62 mil

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6Micetek International Inc.
MPC8308_RDB Hardware
1.3 Mechanical Data
Figure 2 shows the MPC8308_RDB dimensions (in mil and [mm]). The board measures 170 mm ×170
mm (6693 mil × 6693 mil) for integration in a mini-ITX chassis.
Figure 2. Dimensions of the MPC8308_RDB

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
Micetek International Inc. 7
Board-Level Functions
2 Board-Level Functions
The board-level functions includes reset, external interrupts, clock distribution, DDR SDRAM controller,
local bus controller, I
2
C interfaces, SD memory card interface, USB interface, eTSEC1 and eTSEC2
10/100/1000 BaseT interface, dual RS-232 ports, PCI Express, and COP/JTAG.
2.1 Reset and Reset Configurations
The MPC8308_RDB reset module generates a single reset to the MPC8308 and other peripherals on the
board. The reset unit provides power-on reset, hard reset, and soft reset signals in compliance with the
MPC8308 hardware specification. Figure 3 shows the reset circuitry. Notice the following:
• PORESET (Power-on reset) is generated by the Micrel MIC811 device. When MR is deasserted
and 3.3 V is ready, the MIC811 internal timeout guarantees a minimum reset active time of 150 ms
before PORESET is deasserted. This circuitry guarantees a 150 ms PORESET pulse width after
3.3 V reaches the right voltage level, and this meets the specification of the PORESET input of
MPC8308. Push button reset interfaces the MR signal with debounce capability to produce a
manual master PORESET
• PORESET (Power-on reset) is optionally generated by the MC9S08 MCU device by monitoring
the 3.3V voltage level
• HRESET (Hard reset) is generated either by the MPC8308 or the COP/JTAG port.
• COP/JTAG port reset provides convenient hard-reset capability for a COP/JTAG controller. The
HRESET line is available at the COP/JTAG port connector. The COP/JTAG controller can directly
generate the hard-reset signal by asserting this line low. The arrangement shown in Figure 3 allows
the COP to independently assert HRESET or TRST, while ensuring that the MPC8308 can drive
HRESET as well.

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Board-Level Functions
Figure 3. Reset Circuitry of the MPC8308
2.2 External Interrupts
Figure 4 shows the external interrupt circuitry to the MPC8308.
Figure 4. MPC8308 Interrupt Circuitry
Following are descriptions of the interrupt signals shown in Figure 4:
MIC811
MR
Push Button
GND
COP_HRESET
COP_TRST
PORESET
NAND FLASH
mini-PCIe
MPC8308_HRESET
Vitesse VSC7385
MC9S08
Optional MCU PORESET
RTL8211B PHYs
COP
MPC8308_TRST
MPC8308_PORESET
MPC8308
TSEC1_IRQ
(RTC_IRQ)
USB_IRQ
L2_IRQ0
L2_IRQ1
THERM_IRQ
IRQ1
IRQ3
IRQ4
(MCU_IRQ)
IRQ0

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Micetek International Inc. 9
Board-Level Functions
• All external interrupt signals are pulled up by 4.7 K resistors.
• MCU interrupt (MCU_IRQ), RTC interrupt (RTC_IRQ) and Thermal interrupt (THERM_IRQ).
The MCU and DS1339 RTC interrupts are ANDed the thermal interrupt. However, MCU interrupt
is the main function for this IRQ pin. RTC and thermal interrupt are optional so they are
disconnected from the AND gate by default.
• PHY interrupt (TSEC1_IRQ). The RTL8211B GBE PHY interrupt is connected to IRQ1 of the
MPC8308. Therefore, the system software can detect the status of the Ethernet link and the PHY
internal status.
• USB over current (USB_IRQ). The USB power supply have an over current detection circuit and
generate an interrupt when the current limit reaches (2A) or a thermal shutdown or under voltage
lockout (UVLO) condition occurs. It is connected to IRQ3 of the MPC8308.
• L2 Switch (VSC7385) interrupt (L2_IRQ1, L2_IRQ0). The L2 Switch (VSC7385) has two IRQs
that are ANDed together to generate an interrupt to the MPC8308E via the IRQ4 signal.

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
10 Micetek International Inc.
Board-Level Functions
2.3 Clock Distribution
Figure 5 and Table 2 show the clock distribution on the MPC8308_RDB.
Figure 5. MPC8308_RDB Clock Scheme
MPC8308
DDR2 SDRAM
CLK
LCLKx
MCK1
MCK2
133 MHz
local bus
DLL
DDR
DLL
33.333 MHz
OSC
CLKIN
System
PLL
125MHz
OSC
TSEC2_GTX_CLK125
PCIE
CLK GEN
25MHz
OSC
SD_REF_CLK
SD_REF_CLK#
mini PCIe
Slot
PCIe/
Serdes
eTSEC2
ULPI USB
GND GND
24 MHz
Crystal
PHY
RTL8211B
GBE PHY
GND GND
25 MHz
Crystal
VSC7385
50MHz
VCXO
IEEE1588
DS1339
RTC
GND
32.768 kHz
Crystal
MC9S08
MCU
GND GND
32.768 kHz
Crystal
GND
Not use
125MHz
OSC
TSEC1_GTX_CLK125 eTSEC1
dotted line is optional which might not
be available
L2 Switch
25MHz
OSC

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
Micetek International Inc. 11
Board-Level Functions
2.4 DDR2 SDRAM Controller
The MPC8308 processor uses DDR2 SDRAM as the system memory. The DDR2 interface uses the SSTL2
driver/receiver and 1.8 V power. A Vref 1.8 V /2 is needed for all SSTL2 receivers in the DDR2 interface.
For details on DDR2 timing design and termination, refer to the Freescale application note entitled
Hardware and Layout Design Considerations for DDR Memory Interfaces (AN2582). Signal integrity test
results show this design does not require terminating resistors (series resistor (R
S
) and termination resistor
(R
T
)) for the discrete DDR2 devices used. DDR2 supports on-die termination; the DDR2 chips and
MPC8308 are connected directly. The interface is 1.8 V provided by an on-board voltage regulator. VREF,
which is half the interface voltage, that is, 0.9 V, is provided by a voltage divider of the 1.8 V for voltage
tracking and low cost. One pair of clock pins is provided by the MPC8308, and they are connected and
shared by the two DDR2 devices. Figure 6 shows the DDR2 SDRAM controller connection.
Table 2. Clock Distribution
Clock Frequency Module Generated by Description
33.333 MHz MPC8308 CLKIN 33.333 MHz oscillator The MPC8308 uses CLKIN to generate the
internal system PLL. The CSB clock is
generated by the internal PLL and is fed to the
e300 core PLL for generating the e300 core
clock.
133 MHz DDR2 SDRAM MPC8308 The DDR memory controller is configured to use
the 2:1 mode CSB to DDR for the DDR interface
(DDR266). The local bus clock uses 1:1 local to
CSB clock, which is configured by hard reset
configuration or SPMR register.
25 MHz L2 Switch and GBE PHY 25 MHz oscillator The 25 MHz oscillator provides the clock for the
L2 switch and the GBE PHY
125 MHz eTSEC1 clock 125 MHz oscillator
(default)
or RTL8211B (optional)
The eTSEC1 reference clock is provided by
a125MHz oscillator or optionally by the gigabit
Ethernet PHY (RTL8211B) on the board.
125 MHz eTSEC2 clock 125 MHz oscillator The eTSEC2 reference clock is provided by a
125MHz oscillator.
100 MHz PCIe/SERDES PCIe Clock Generator The PCIe Clock Generator provides differential
clock for PCIe/SERDES module and the PCIe &
mini PCIe slots
50 MHz IEEE1588 Clock (TMR_CLK) 50 MHz oscillator/ 50
MHz VCXO
50 MHz is used by the IEEE 1588 module. It can
be an ordinary oscillator or VCXO controlled by
SPI DAC.
24 MHz ULPI external USB PHY 24 MHz crystal Clock for ULPI USB PHY USB3300
32.768kHz MCU MC9S08 32.768kHz Crystal Clock for MCU
32.768kHz RTC DS1339 32.768kHz Crystal Clock for RTC

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12 Micetek International Inc.
Board-Level Functions
Figure 6. DDR2 SDRAM Connection
2.5 Local Bus Controller
The MPC8308 local bus controller has a 16-bit LD[0:15] data and 26-bit LA[0:25] address bus and control
signals. The non multiplexed bus provides an easy and direct way to interface with other standard memory
device. The followings modules are connected to the local bus of MPC8308:
• 8 MByte NOR flash memory
• 32 MByte NAND flash memory
• GBE L2 switch (VSC7385) parallel interface (PI)
DDR2 Device (512Mb, 16-Bit)
MPC8308
DDR2
Controller
DDR2 Device (512 Mb, 16-Bit)
MCS0
MCK, MCK, MCKE
MRAS, MCAS, MWE
MDM[0:3], MDQS[0:3]
A[0:14], BA[0:2]
MDQ[0:31]
ODT
VREF
1.8 V Reg
VREF

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Micetek International Inc. 13
Board-Level Functions
2.5.1 NOR Flash Memory
Through the general-purpose chip-select machine (GPCM), the MPC8308_RDB provides 8 Mbyte of
flash memory using a chip-select signal. The flash memory is used with the 16-bit port size. Figure 7
shows the hardware connections for the flash memory.
Figure 7. NOR Flash Connection
2.5.2 NAND Flash Memory
The MPC8308 has native support for NAND flash memory through its NAND flash control machine
(FCM). The MPC8308_RDB implements an 8-bit NAND flash with 32 MByte in size. Figure 8 shows the
NAND flash connection.
Figure 8. NAND Flash Connection
MPC8308
eLBC
Controller
NOR
Flash 16-Bit
NOR_CS
*NOTE: NOR_CS can be either CS0 or CS1
by DIP switch option, default is CS0
LA[24:4] A[0:20]
LD[15:0] DQ[0:15]
WE
OE
WE0
GPL2
MPC8308
eLBC
Controller
NAND
Flash 8-Bit
NAND_CS
*NOTE: NAND_CS can be either CS0 or CS1
by DIP switch option; the default is CS1
CLE
ALE
WE
RE
R/B
WP
GPL0
GPL1
WE0
GPL2
GPL4
GPL3
LD[0:7] IO[7:0]

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14 Micetek International Inc.
Board-Level Functions
2.5.3 VSC7385 Parallel Interface
Figure 9 shows the local bus connection to the Vitesse VSC7385 parallel interface.
Figure 9. VSC7385 Parallel Interface connection
2.6 I
2
C Interfaces
The MPC8308 has two I
2
C interfaces. On the MPC8308_RDB, I
2
C1 is used as master mode and it is
connected to following devices.
• MCU MC9S08QG8 at address 0x0A.
• Optional DAC AD5301 at address 0x0C.
• PCF8574 I
2
C expander at address 0x39.
• Thermal sensor LM75 at address 0x48.
• Serial EEPROM M24256 at address 0x50.
• Real-time clock DS1339U at address 0x68.
The M24256 serial EEPROM can be used to store the reset configuration word of the MPC8308, as well
as to store the configuration registers values and user program if the MPC8308 boot sequencer is enabled.
By default, the EEPROM is not used and the hard reset configuration words are loaded from local bus flash
memory. For details on how to program the reset configuration word value in I
2
C EEPROM and the boot
sequencer mode, refer to the MPC8308 reference manual.
There is a PCF8574A I
2
C I/O expander on the MPC8308_RDB board to provide general purpose I/O
expansion via the I2C1 interface. The PCF8574A has I2C1 address 0x39 and it is able to detect the board
revision number, which flash is currently used to boot and two reserved bit for future expansion. The bit
definition of the PCF8574A is defined as in Table 3:
I
2
C2 is connected to the clock generator ICS9FG104 and mini PCI-E socket.
MPC8308
eLBC
Controller VSC7385
PI 8-Bit
LCS2
LA[25:9] A[0:16]
LD[7:0] D[0:7]
WE
OE
WE0
GPL2
Done
GPL2

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Micetek International Inc. 15
Board-Level Functions
Table 3. PCF8574A Bit Descriptions
2.7 SD Memory Card Interface
SD memory card interface is connected to the eSDHC interface of the MPC8308. Figure 10 shows the
hardware connection.
CAUTION
Power down before inserting or removing the SD memory card.
PCF8574A
(U10) bit[0..7] Name Read/Write Description
0 REV1 Read only, write
has no effect
Board revision number
REV[0:1] definition
00: revision 1.0
01: reserved
10: reserved
11: reserved
1 REV0
2 RSVD1 Read only, write
has no effect
Reserved for future use
3 RSVD0 Read only, write
has no effect
Reserved for future use
4 BOOT0 Read only, write
has no effect
Used to determine which flash is used for boot flash
0: NOR Flash is the boot flash
1: NAND Flash is the boot flash
5 Not used — —
6 Not used — —
7 Not used — —

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16 Micetek International Inc.
Board-Level Functions
Figure 10. SD Memory Card Connection
2.8 USB Interface
MPC8308 supports a USB 2.0 high speed host/device/OTG interface through external ULPI USB PHY.
The USB connection on MPC8308_RDB is shown in Figure 11.
Figure 11. USB Connections
2.9 eTSEC 10/100/1000 BaseT Interface
On the MPC8308_RDB_RDB board, RGMII mode is used on both eTSEC1 and eTSEC2, which are
connected to the on-board 10/100/1000 PHY (RTL8211B) and the 5-port GBE switch (VSC7385)
respectively. The I/O voltage is set to 3.3 V RGMII for RTL8211B and 2.5V RGMII for VSC7385. The
RGMII (1000 BaseT) is a source synchronous bus. For a transmit bus connection, it is synchronous to
GTX_CLK from the eTSEC module. The receive bus connection is synchronous to RX_CLK generated
MPC8308
D[0:3]
CMD
SCLK
INSERT
CONTACT
PROTECT
SD_DAT[0:3]
SD_CMD
SD_CLK
SD_CONTACT
SD_WP
SD_DAT[0:3]
SD_CMD
SD_CLK
SD Memory Card Socket
SD_WP
SD_CD
DS1100 SD_CLK_DELAY
LPF
LPF
SD_CD
3.3V
Resistor not populated
Resistor populated (Default)
MPC8308
ULPI_D[7:0]
ULPI_STP
ULPI_NXT
ULPI_CLK
DIR
USB3300
D[7:0]
STP
NXT
CLKOUT
CPEN
ULPI_DIR
MIC2505
VBUS
DM
DP
ID
USB Type Mini-AB
5 V

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
Micetek International Inc. 17
Board-Level Functions
from the PHY device. The MPC8308 MII management interface is connected to the RTL8211B only.
Figure 12 shows the connection between the MPC8308 eTSEC1 to the RTL8211B and eTSEC2 to the
VSC7385.
Figure 12. eTSEC Interface Connection
2.10 Dual RS-232 Ports
Dual RS-232 ports are supported on the board. Figure 13 illustrates the serial port connection using a
MAX3232 3.3V RS-232 driver to interface with a 9-pin D type female connector. This serial connection
runs at up to 115.2 Kbps.
RJ-45
eTSEC1
MPC8308
RTL8211B
MDIO
MDC
EC_MDIO
EC_MDC
RGMII interface
PHY addr = 0x02
eTSEC2
2.5 V
NVDDF
Port 0
Port 1
Port 2
Port 3
Port 4
VSC7385 RJ-45
MDIO
MDC
(Enet0)
(Enet1)
RJ-45
(Enet2)
RJ-45
(Enet3)
RJ-45
(Enet4)
RJ-45
(Enet5)
3.3 V
NVDDC
RGMII interface
Local Bus
LCS2, GPCM 8bit data
1

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18 Micetek International Inc.
Board-Level Functions
Figure 13. RS-232 Debug Ports Connection
2.11 COP/JTAG Port
The common on-chip processor (COP) is part of the MPC8308 JTAG module and is implemented as a set
of additional instructions and logic. This port can connect to a dedicated emulator for extensive system
debugging. Several third-party emulators in the market can connect to the host computer through the
Ethernet port, USB port, parallel port, RS-232, and so on. A typical setup using a USB port emulator is
shown in Figure 14.
Figure 14. Connecting MPC8308_RDB to a USB Emulator
MPC8308
UART1
RXD
TXD
UART2
RXD
TXD
MAX3232
TXD
RXD
RX
TX
TX
DO
DI
DI
Female DB-9
RS-232
Serial
Port
RX
DO 3
2
TXD
RXD
Female DB-9
RS-232
Serial
Port
3
2
PC
MPC8308_RDB
P2
USB
Emulator
USB Port
COP Port

PowerQUICC™ MPC8308_RDB User’s Guide, Rev. 3
Micetek International Inc. 19
Connectors, Jumpers, Switches, and LEDs
The 16-pin generic header connector carries the COP/JTAG signals and the additional signals for system
debugging. The pinout of this connector is shown in Figure 15.
Figure 15. MPC8308_RDB COP Connector
3 Connectors, Jumpers, Switches, and LEDs
Table 4 summarizes the connectors, jumpers, switches, and LEDs on the MPC8308_RDB, and it provides
the number of the section/page on which each is discussed. The rest of this section discusses each of these
in the order of its appearance in the table.
Table 4. Connectors, Headers, Jumpers, Switches, and LEDs
Reference Description
Connectors
P1 Dual UART connector. UART1 (top), UART2 (bottom)
P2 16-pin COP/JTAG connector
P3 miniPCI Express connector
P4 IEEE 1588 connector (Optional)
P5 SD memory card socket
P8 USB mini-AB Connector (external ULPI USB PHY)
P9 RJ-45 LAN connectors Enet4 (top), Enet5 (bottom)
P10 RJ-45 LAN connectors Enet2 (top), Enet3 (bottom).
P11 RJ-45 LAN connectors Enet0 (top), Enet1 (bottom).
P12 4-pin 5V and 12V power jack connector
P13 4-pin 5V and 12V floppy disk connector for external power of mini PCI Express card
BT1 RTC battery holder, CR2032 type. The real-time clock on the RDB requires a battery when
the board is powered off. When placing or replacing the battery, take care to ensure that the
polarity is correct.
J3 Background Debug Mode (BDM). Header for flash programming and debug of on-board
MC9S08QG8 Micro controller.
J5 Case connector
TDI
Pull-up
TCK
TMS
SRESET
HRESET
CKSTP_OUT
GND
TRST
Pull-up
CKSTP_IN
NC
NC
NC
GND
1
TDO

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20 Micetek International Inc.
Connectors, Jumpers, Switches, and LEDs
3.1 COP Connector (P2)
The COP connector allows the user to connect a COP/JTAG-based debugger to the MPC8308 for
debugging. Table 5 lists the pin assignments of the COP connector.
J8 SPI interfaces connector
Jumpers
J1 MCU battery backup enable. Install jumper 1-2 to power MCU in battery standby mode. This
is required if the MCU is programmed to function as a real time clock. Install jumper 2-3
(default) to power real time clock chip DS1339 if the MCU real time clock function is not used
J2 12V fan connector
J4 RS-232C #2 select header. Selects RS-232C #2 on P1 (bottom) to be connected to either
CPU UART2 (Install jumpers 1–3, 2–4 as default) or MCU SCI (Install jumpers 3–5, 4–6).
Alternatively, CPU UART2 can be connected to the MCU SCI instead (Install jumpers 5–7,
6–8).
J6 MCU LED1 header. Connection to external, MCU controlled LED1. Pin 1 is Anode
J7 CPU Power-on reset source jumper. CPU Power-On Reset can be controlled by a hardware
MIC811 reset chip (jumper 2–3 as default) or by MCU firmware (jumper 1–2).
Switches
S1 Board revision and boot Flash selection switch.
S2 Reset configuration word source selection switch.
S3 Power-on push button. Powers up the MPC8308_RDB board.
S4 System reset button. Resets the MPC8308_RDB board.
LEDs
D1 USB PHY CTL0
D2 USB PHY CTL1
D3 USB VBUS
D4 Enet1 LINK10
D5 Enet1 LINK100
D6 Enet1 DUPLEX
D7 Enet1 RX
D11 MCU LED1
D12 MCU LED2
D16 5 V Indicator
D17 5 V standby indicator
D18 3.3V Indicator
Table 4. Connectors, Headers, Jumpers, Switches, and LEDs (continued)
Reference Description