JETWAY MM21 Series User manual

MM21 Series
User’s Manual
No. G03-MM21-F
Rev: 1.0
Release date: September 29, 2022
Trademark:
* Specifications and Information contained in this documentation are furnished for information use only, and are
subject to change at any time without notice, and should not be construed as a commitment by manufacturer.

ii
ENVIRONMENTAL SAFETY INSTRUCTION ....................................................................... iii
ENVIRONMENTAL PROTECTION ANNOUCEMENT...........................................................iii
USER’S NOTICE ..................................................................................................................iv
MANUAL REVISION INFORMATION...................................................................................iv
ITEM CHECKLIST................................................................................................................ iv
CHAPTER 1 INTRODUCTION OF THE MOTHERBOARD
1-1 SPECIFICATION .................................................................................................... 1
1-2 LAYOUT DIAGRAM ...............................................................................................2
CHAPTER 2 HARDWARE INSTALLATION
2-1 JUMPER SETTING................................................................................................. 7
2-2 CONNECTORS AND HEADERS............................................................................ 9
2-2-1 REAR I/O BACK PANEL CONNECTORS................................................. 9
2-2-2 MOTHERBOARD INTERNAL CONNECTORS..........................................11
2-2-3 HEADER PIN DEFINITION........................................................................ 15
2-2-4 Maximum Voltage & Current Limit.......................................................... 18
CHAPTER 3 INTRODUCING BIOS
3-1 ENTERNING SETUP.............................................................................................. 19
3-2 BIOS MENU SCREEN............................................................................................ 20
3-3 FUNCTION KEYS...................................................................................................20
3-4 GETTING HELP...................................................................................................... 20
3-5 MENU BARS.......................................................................................................... 21
3-6 MAIN MENU...........................................................................................................21
3-7 ADVANCED MENU ................................................................................................22
3-8 CHIPSET MENU..................................................................................................... 33
3-9 SECURITY MENU ..................................................................................................35
3-10 BOOT MENU.......................................................................................................... 37
3-11 SAVE & EXIT MENU .............................................................................................. 38
TABLE OF CONTENT

iii
Environmental Safety Instruction
Avoid the dusty, humidity and temperature extremes. Do not place the product in
any area where it may become wet.
0 to 40 centigrade is the suitable temperature. (The figure comes from the request
of the main chipset)
Generally speaking, dramatic changes in temperature may lead to contact
malfunction and crackles due to constant thermal expansion and contraction from
the welding spots’ that connect components and PCB. Computer should go
through an adaptive phase before it boots when it is moved from a cold
environment to a warmer one to avoid condensation phenomenon. These water
drops attached on PCB or the surface of the components can bring about
phenomena as minor as computer instability resulted from corrosion and oxidation
from components and PCB or as major as short circuit that can burn the
components. Suggest starting the computer until the temperature goes up.
The increasing temperature of the capacitor may decrease the life of computer.
Using the close case may decrease the life of other device because the higher
temperature in the inner of the case.
Attention to the heat sink when you over-clocking. The higher temperature may
decrease the life of the device and burned the capacitor.
Environmental Protection Announcement
Do not dispose this electronic device into the trash while discarding. To minimize
pollution and ensure environment protection of mother earth, please recycle.

iv
USER’S NOTICE
COPYRIGHT OF THIS MANUAL BELONGS TO THE MANUFACTURER. NO PART OF THIS MANUAL,
INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT MAY BE REPRODUCED, TRANSMITTED
OR TRANSLATED INTO ANY LANGUAGE IN ANY FORM OR BY ANY MEANS WITHOUT WRITTEN
PERMISSION OF THE MANUFACTURER.
THIS MANUAL CONTAINS ALL INFORMATION REQUIRED TO USE THIS MOTHER-BOARD SERIES AND WE
DO ASSURE THIS MANUAL MEETS USER’S REQUIREMENT BUT WILL CHANGE, CORRECT ANY TIME
WITHOUT NOTICE. MANUFACTURER PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY
KIND, AND WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFIT, LOSS OF BUSINESS, LOSS OF USE OF DATA,
INTERRUPTION OF BUSINESS AND THE LIKE).
PRODUCTS AND CORPORATE NAMES APPEARING IN THIS MANUAL MAY OR MAY NOT BE
REGISTERED TRADEMARKS OR COPYRIGHTS OF THEIR RESPECTIVE COMPANIES, AND THEY ARE
USED ONLY FOR IDENTIFICATION OR EXPLANATION AND TO THE OWNER’S BENEFIT, WITHOUT
INTENT TO INFRINGE.
Manual Revision Information
Reversion Revision History Date
1.0 First Edition September 29, 2022
Item Checklist
Motherboard
Cable(s)
I/O Back panel shield

1
Chapter 1
Introduction of the Motherboard
1-1 Specification
Spec
Description
Design
Micro ATX form factor; PCB size: 24.4 x24.4 cm
Chipset
MM21-Q4700/Q4702 Series: Intel Q470E Chipset
MM21-W4800/W4802 Series: Intel W480E Chipset
CPU Socket
IntelLGA 1200 Socket supports 10th/11th Gen. Processor
(Max. 95WTDP)
*Note:for detailed CPU support information please visit our
website
Memory Slots
4* Long DIMM DDR4 slot for 4* DDR4
3200/2933/2666/2400MHz RAM Module
Support dual channel function
Maximum capacity: up to 128GB
Maximum frequency: 3200 MHz (depends on CPU support)
*Note:MM21-W4800/W4802 series supports DDR4 ECC SDRAM
Expansion
Slots
1* PCI-Express x1 slot (PCIE1)
1* PCI-Express x16 slot (*PCIE2)
1* PCI-Express x4 slot (PCIE3)
1* PCI-Express x8 slot (*PCIE4)
*Note:PCIE2 slot share x16 lane band width with PCIE4 slot.
1* M.2 E-key slot, type-2230 PCIex1/USB2.0 interface support
CNVi (M2E1)
Storage
MM21-Q4700/Q4702 Series: 6* SATAIII 6Gb/s port support
RAID 0/1/5/10 (SATA_RA1/2/3)
MM21-W4800/W4802 Series: 8* SATAIII 6Gb/s port support
RAID 0/1/5/10 (SATA_RA1/2/3;SATA7/8)
1* M.2 M-key slot, type-2242/2260/2280/22110 PCIex4
interface supports NVMe (M2M1)
1* M.2 M-key slot, type-2260/2280 PCIex2 interface (M2M2)
LAN Chips
1* Intel i219-LM 1.0GbE & 1* Intel i210-AT 1.0GbE
2* Intel i225-V 2.5GbE (For MM21-Q4700/Q4702)
2* Intel i225-LM 2.5GbE (For MM21- W4800/W4802)
Note: 2500Mbps high-speed transmission rate is only supported
over CAT 5e UTP cable.
BIOS
AMI Flash ROM BIOS
Multi I/O
Rear Panel I/O:
2* RS232/422/485 COM ports
2* HDMI 1.4 ports
2* 2.5GbE RJ-45 LAN ports
2* 1.0GbE RJ-45 LAN ports
4* USB 3.2(Gen.2) ports
Internal I/O Connectors & Headers:
1* 24-pin main power connector
1* 8-pin 12V power connector

2
1* CPUFAN connector & 6* SYSFAN connector
1* Front panel header
2* 9-Pin USB 2.0 headers for 4* USB 2.0 expansion ports
1* 19-Pin USB 3.2(Gen.1) header for 2* USB 3.2(Gen.1) ports
1* 8-bit GPIO header
1* PS/2 Keyboard & Mouse header
1* SMBUS header
4* RS232 COM port headers
(Optional for MM21-Q4700/Q4702 series only )
TPM 2.0 Function
Optional for MM21-Q4702 & MM21-W4802 Series
1-2 Layout Diagram
Rear IO Diagram
*Note: COM1-2 for MM21-Q4700/Q4702 Series support RS232/422/485 function;
COM1-2 for MM21-W4800/W4802 Series support RS232 function only.
COM1
Serial Port
COM2
Serial Port
RJ-45 LAN Ports
(2.5GbE)
RJ-45 LAN Ports
(1.0GbE)
HDMI Port
HDMI Port
USB 3.2(Gen.2) Ports

3
Motherboard Internal Diagram
MM21-Q4700/Q4702 Series:
*Note: PCIE4 slot share x16 lane band width with PCIE2 slot. Configuration solutions: 1* PCIE x16
card, please plug in PCIE2 slot to run at x16 (Max.) lane band width; in the case that 2* PCIE cards
plugged in PCIE2 & PCIE4 slots, since the 2* PCIE slots share x16 lane band width, each card will run
at x8 (Max.) lane band width.
*Rear IO
Connector
(Refer to Page-2)
ATX Power
Connector
ATX 12V
Power Connector
LGA 1200
CPU Socket
Intel Q470E Chipset
DDR4
DIMM Slot x 4
M.2 M-Key Slot
Type-2260/2280
(M2M2)
M.2 M-Key Slot
Type-2242/2260/2280/22110
(M2M1, support NVMe)
M.2 E-Key Slot
Type-2230
(M2E1, support CNVi)
Front Panel
Header
SYSFAN1
SYSFAN2
SYSFAN3
SYSFAN4
SYSFAN5
SYSFAN6
CPUFAN1
SMBUS1
Header
USB 3.2(Gen.1)
Header
USB 2.0 Headers
SATAIII Ports
(SATA_RA1/2/3)
RS232 Serial Port Headers
(COM3/4/5/6)
GPIO Header
PS/2 KBMS
Header
PCIE1 ： PCIE x1 Slot
*PCIE2 ： PCIE x16 Slot(share with PCIE4)
PCIE3 ： PCIE x4 Slot
*PCIE4 ： PCIE x8 Slot(share with PCIE2)

4
MM21-W4800/W4802 Series:
*Note: 1.PCIE4 slot share x16 lane band width with PCIE2 slot. Configuration solutions: 1* PCIE x16
card, please plug in PCIE2 slot to run at x16 (Max.) lane band width; in the case that 2* PCIE cards
plugged in PCIE2 & PCIE4 slots, since the 2* PCIE slots share x16 lane band width, each card will run
at x8 (Max.) lane band width.
*Rear IO
Connector
(Refer to Page-2)
ATX Power
Connector
ATX 12V
Power Connector
LGA 1200
CPU Socket
Intel W480E Chipset
DDR4
DIMM Slot x 4
M.2 M-Key Slot
Type-2260/2280
(M2M2)
M.2 M-Key Slot
Type-2242/2260//2280/22110
(M2M1, support NVMe)
M.2 E-Key Slot
Type-2230
(M2E1, support CNVi)
Front Panel
Header
SYSFAN1
SYSFAN2
SYSFAN3
SYSFAN4
SYSFAN5
SYSFAN6
CPUFAN1
SMBUS1
Header
USB 3.2(Gen.1)
Header
USB 2.0 Headers
SATAIII Ports
(SATA_RA1/2/3)
GPIO Header
PS/2 KBMS
Header
PCIE1 ： PCIE x1 Slot
*PCIE2 ： PCIE x16 Slot(share with PCIE4)
PCIE3 ： PCIE x4 Slot
*PCIE4 ： PCIE x8 Slot(share with PCIE2)
SATAIII Port
(SATA7)
SATAIII Port
(SATA8)

5
Motherboard Jumper Position:
*Note:The diagrams in the manual are mostly taken from MM21-Q4700/Q4702 series unless
otherwise stated.
Jumper
Jumper
Name
Description
Pitch
JBAT
Clear CMOS RAM Settings
3-pin Block
2.0mm
JAT_ATX
ATX/AT Mode Select
3-pin Block
2.54mm
COPEN
Case Open Message Display Detect
2-pin Block
2.54mm
JP1
ME Features Select
2-pin Block
2.0mm
JP2
COM1 Port Pin9 Function Select
4-pin Block
2.0mm
JP3
COM2 Port Pin9 Function Select
4-pin Block
2.0mm
JP4
PCIe x16 & PCIe x8 Function Select
2-pin Block
2.0mm
JP2
JP3
JBAT
JAT_ATX
COPEN
JP1
JP4

6
Connectors
Connector
Name
COM1-2
Serial Port X2
HDMI1-2
HDMI 1.4 Port X2
(Max Resolution: 4096x2160@30Hz)
LAN3/LAN4
2.5GbE RJ-45 LAN Port X2
UL1/UL2
Top: 1.0GbE RJ-45 LAN Port X2
Middle & Bottom: USB 3.2(Gen.2) Port X4
ATXPWR1
ATX Type Main Power Connector
ATX12V1
ATX 12V Power Connector
CPUFAN1
CPU FAN Connector
SYSFAN1/2/3/4/5/6
System FAN Connector X6
SATA_RA1/2/3
SATAIII Connector X6
*SATA7/SATA8
SATAIII Connector X2
*Note:SATA7 & SATA8 ports are only optional for MM21-W4800/W4802 series.
Headers
Header
Name
Description
Pitch
FP
(Front Panel Header)
PWR LED/ HD LED/ Power Button
/Reset
9-pin Block
2.54mm
FP_USB2/FP_USB3
USB 2.0 Port Header X2
9-pin Block
2.54mm
FP_USB1
USB 3.2(Gen.1) Port Header
19-pin Block
2.0mm
*COM3/4/5/6
RS232 Serial Port Header X4
9-pin Block
2.54mm
GPIO
GPIO Header
10-pin Block
2.54mm
PS2KBMS
PS/2 Keyboards & Mouse Header
6-pin Block
2.54mm
SMBUS1
SMBUS Header
5-pin Block
2.0mm
*Note:COM3/4/5/6 ports are only optional for MM21-Q4700/Q4702 series.

7
Chapter 2
Hardware Installation
2-1 Jumper Setting
JBAT (3-pin): Clear CMOS RAM Settings Pitch=2.0mm
3
1
3
1
1-2 Open: Normal;
2-3 Closed: Clear CMOS.
JAT_ATX (3-pin): AT Mode /ATX Mode Select Pitch=2.54mm
1
3
1
3
JAT_ATX
→
ATX/AT Mode Select
1-2 Closed: ATX Mode Selected;
2-3 Closed: AT Mode Selected.
*ATX Mode Selected: Press power button to power on after power input ready;
AT Mode Selected: Directly power on as power input ready.
JAT_ATX
JBAT

8
COPEN (2-pin): Case Open Message Display Function Pitch=2.54mm
Pin1
COPEN → Case Open Detection
CASE OPEN
GND
Pin 1-2 Short:When Case open function pin short to GND, the Case open function
was detected. When Used, needs to enter BIOS and enable ‘Case Open Detect’
function. In this case if your case is removed, next time when you restart your
computer, a message will be displayed on screen to inform you of this.
JP2 (4-pin): COM1 Port Pin9 Function Select Pitch=2.0mm
JP2
→
COM1 Port Pin-9
4-6 Closed:
RI= 12V.
1
3
5
3-4 Closed:
RI= 5V;
2-4 Closed:
RI=RS232;
4
6
2
1
3
5
4
2
6
2
4
6
1
3
5
JP3 (4-pin): COM2 Port Pin9 Function Select Pitch=2.0mm
JP3 → COM2 Port Pin-9
4-6 Closed:
RI= 12V.
1
3
5
3-4 Closed:
RI= 5V;
2-4 Closed:
RI=RS232;
4
6
2
1
3
5
4
2
6
2
4
6
1
3
5
JP2
JP3
COPEN

9
JP1 (2-pin): ME Features Select Pitch=2.0mm
Pin1
JP1
→
ME Features Select
Pin1
1-2 Closed: Disable ME Features.
1-2 Open: Enable ME Features(Default);
JP4 (2-pin): PCIe x16 & Dual PCle x8 Function Select Pitch=2.0mm
Pin1
JP4
→
PCIe x16 & Dual PCIe x8 Function Select
Pin1
1-2 Closed: Dual PCIe x8 Select.
1-2 Open: PCIe x16 Select (Default);
2-2 Connectors and Headers
2-2-1 Rear I/O Back Panel Connectors
*Refer to Page-2 Rear IO Diagram
Icon
Name
Function
Serial Port
Mainly for user to connect external MODEM or
other devices that supports Serial
Communications Interface.
For MM21-Q4700/Q4702: RS232/422/485
For MM21-W4800/W4802: RS232
HDMI 1.4 Port
To connect display device that support HDMI
specification.
RJ-45 LAN Port
This connector is standard RJ-45 LAN jack for
Network connection. LAN3 & LAN4 port support
2.5GbE transfer rate. (*Note: 2.5Gbps is only
supported with CAT 5e UTP cable).
JP1
JP4

10
RJ-45 LAN Port
This connector is standard RJ-45 LAN jack for
Network connection. These two RJ-45 LAN port
from UL1 and UL2 support 1.0GbE transfer rate.
USB 3.2(Gen.2) Port
To connect USB keyboard, mouse or other
devices compatible with USB 3.2(Gen.2)
specification. Ports support up to 10Gbps data
transfer rate.
*Note: Maximum current limit for USB ports from UL1/UL2 is 1.5A while using 5V
working voltage.
COM1-2 (9-pin Block): Serial Port
*Note: COM1-2 for MM21-Q4700/Q4702 Series support RS232/422/485
function;COM1-2 for MM21-W4800/W4802 Series support RS232 function only.
The pin assignment for RS232/422/485 is listed as follows:
1
2
3
4
5
6
7
8
9
RS232 DCD#
RS232 SIN
RS232 SOUT
RS232 DTR#
GND
RS232 RI#
RS232 CTS#
RS232 RTS#
RS232 DSR#
RS232 Mode
(MM21-Q4700/Q4702 Series
& MM21-W4800/W4802 Series)
RS422 Mode
(MM21-Q4700/Q4702 Series)
RS485 Mode
(MM21-Q4700/Q4702 Series)
Pin1
GND
RS422 RX(B)
RS422 RX(A)
RS422 TX(A)
RS422 TX(B)
Pin1
GND
RS485 D+(A)
RS485 D-(B)
Pin1
For MM21-Q4700/Q4702 series, COM1 & COM2 port can function as
RS232/422/485 port. In default settings COM1/2 functions as RS232 port. With
compatible COM cable COM1 can function as RS422 or RS485 port. User also needs
to go to BIOS to set ‘Transmission Mode Select’for COM1/2 at first, before using
specialized cable to connect different pins of this port.

11
2-2-2 Motherboard Internal Connectors
(1) ATXPWR1 (24-pin block): Main Power Connector
ATX Power Supply connector: This is a new defined 24-pins connector that usually
comes with ATX case. The ATX Power Supply allows using soft power on momentary
switch that connect from the front panel switch to 2-pins Power On jumper pole on the
motherboard. When the power switch on the back of the ATX power supply turned
on, the full power will not come into the system board until the front panel switch is
momentarily pressed. Press this switch again will turn off the power to the system
board.
** We recommend that you use an ATX 12V Specification 2.0-compliant power
supply unit (PSU) with a minimum of 350W power rating. This type has 24-pin and
4-pin power plugs.
** If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the
20-pin power plug can provide at least 15A on +12V and the power supply unit has a
minimum power rating of 350W. The system may become unstable or may not boot
up if the power is inadequate.
** If you are using a 20-pin power plug, please refer to Figure1 for power supply
connection. Power plug form power supply and power connectors from motherboard
both adopt key design to avoid mistake installation. You can insert the power plug into
the connector with ease only in the right direction. If the direction is wrong it is hard to
fit in and if you make the connection by force if is possible.
PIN
ROW1
ROW2
1
+3.3V
+3.3V
2
+3.3V
-12V
3
GND
GND
4
+5V
Soft Power on
5
GND
GND
6
+5V
GND
7
GND
GND
8
Power OK
-5V
9
+5V Stand by
+5V
10
+12V
+5V
11
+12V
+5V
12
+3.3V
GND
24-pin Main Power Connector
Figure1：20-pin power plug Figure 2：24-pin power plug

12
(2) LAN1/LAN2 (1.0GbE) RJ-45 LAN Port
** There are two LED next to the LAN port. Please refer to the table below for the
LAN port LED indications
(3) LAN3/LAN4 (2.5GbE) RJ-45 LAN Port
** There are two LED next to the LAN port. Please refer to the table below for the
LAN port LED indications
Note: 2500Mbps high-speed transmission rate is only supported over CAT 5e UTP cable
(4) ATX12V1 (8-pin block): 12V Power Connector
This is a new defined 8-pin connector that usually comes with ATX Power Supply that
supports extra 12V voltage to maintain system power consumption. Without this
connector might cause system unstable because the power supply cannot provide
sufficient current for system.
A: Speed LED
Status
Description
Off
10Mbps Connection
Green
100Mbps Connection
Orange
1Gbps Connection
B: Activity/Link LED
Status
Description
Off
No Link
Blinking
Data Activity
On
Link
A: Activity/Link LED
Status
Description
Off
No Link
Blinking
Data Activity
On
Link
B: Speed LED
Off
10/100Mbps
Connection
Green
1Gbps Connection
Orange
2.5Gbps Connection
Speed
LED
Activity/Link
LED
Activity/Link
LED
Speed
LED

13
(5) CPUFAN1 (4-pin): CPU Fan Connector
Pin1
+12V Fan Power
GND
Fan Speed
Control
(6) SYSFAN1/2/3/4/5/6 (3-pin): System Fan Connectors
Fan Speed
GND
Pin1
+12V Fan Power
(7) SATA_RA1/2/3 & SATA7/8*(7-pin): SATAIII Port connector
These are high-speed SATAIII ports that support 6GB/s transfer rate.
*SATA7 & SATA8 is only optional for MM21-W4800/W4802 series.
Pin No.
Definition
1
GND
2
TXP
3
TXN
4
GND
5
RXN
6
RXP
7
GND
CPUFAN1
SYSFAN2
SYSFAN1
SYSFAN3
SYSFAN4
SYSFAN5
SYSFAN6
SATA_RA1
SATA_RA2
SATA_RA3
*SATA7
*SATA8

14
(8) M2M1 & M2M2 Slot: M.2 M-Key Slot
M2M1 M.2 M-Key slot supports compatible type-2242/2260/2280/22110 PCIE x4
SSD modules.
M2M2 M.2 M-Key slot supports compatible type-2260/2280 PCIE x2 SSD modules.
M2M1 Slot:
*Note: the manual takes M2M1 as an example for
installation illustration; M2M2 follows basically the
same installation steps.
Z
M2M1 Slot Installation Guide:
1. Prepare compatible M.2 SSD card. Deferent type of cards has different
length. Find corresponding nut location for further installation.
Nut Location
MH1
MH2
MH3
MH4
Card Length
4.2 cm
6cm
8 cm
11 cm
Module Type
Type- 2242
Type-2260
Type- 2280
Type- 22110
2. Remove the screw post and nut fixed at
location MH4 by default (Skip step 2 & 3
and go straight to Step 4 if you are going
to use the default nut).
3. Lock the screw post into the location
corresponding to the length of the
module.
4. Align and insert corresponding M.2
module, as the photo shows.
5. Tighten up the screw to secure the
module into the M.2 connector. Mare
sure not over tighten the screw to avoid
possible damage to the module.
M2M1
M2M2

15
(9) Dual Channel Memory Installation:
Notice!
For dual channel installation, you need to install the same brand, speed, size and
type memory module.
It is unable to activate dual channel feature if you install one or three memory
modules, or you install DIMM1 & DIMM4 / DIMM2 & DIMM3. Slot order can be
from left-to-right or right-to-left, and it must be installed in pairs.
If you install memory modules in wrong direction, it will damage the motherboard
and memory module.
2-2-3 Header Pin Definition
(1) FP (9-pin): Front Panel Header Pitch=2.54mm
()
HDDLED+
GND
PWRLED+
GND
PWRLED-
HDDLED-
RSTSW
VCC
PWRBT
N
Pin 1
2
Configuration
DIMM1
DIMM2
DIMM3
DIMM4
1
install
--
install
--
2
--
install
--
install
3
install
install
install
install
FP

16
(2) FP_USB2/FP_USB3 (9-pin): USB 2.0 Port Headers Pitch=2.54mm
VCC
+DATA
VCC
GND
-DATA
-DATA
GND
+DATA
Pin 1
2
NC
(3) FP_USB1 (19-pin):USB 3.2(Gen.1) Port Header Pitch=2.0mm
SSRX2-
SSRX2+
GND2
SSTX2-
SSTX2+
GND3
D2-
D2+
VBUS_5V
11
Pin1
10
VBUS_5V
SSRX1-
SSRX1+
GND0
SSTX1-
SSTX1+
GND1
D1-
D1+
NC
(4) COM3/4/5/6 (9-pin): RS232 Serial Port Header Pitch=2.54mm
*Note: COM3/4/5/6 ports are optional for MM21-W4800/W4802 Series.
DCD
Pin1
Pin6
SIN
SOUT
DTR
GND
DSR
RTS
CTS
RI
FP_USB1
COM3
COM4
COM5
COM6
FP_USB3
FP_USB2