Wiznet IOP4IoT W7500 User manual

IOP4IoT W7500
IOP4IoT W7500/
W7500P
Schematic Design Guide
This is a preliminary document release. All specifications are subject to
change without notice.
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These are the reference schematic for W7500/W7500P design; the Reset Pin must be included
in the design as below reference schematic files.
W7500
IP Plus PHY
RealTek PHY
W7500P
W7500_Ref_Sche
matic(RT).PDF
W7500P_Ref_Sche
matic.PDF
W7500_Ref_Sche
matic(IC+).PDF
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IOP4IoT W7500
1. Default
Connect the Reset Pin to the VDD using the pull-up resistance.
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IOP4IoT W7500
2. Using a Supervisor IC
When using a Reset Switch, a supervisor chip like MAX823, which has watchdog
function for monitoring the chip after Reset, is recommended.
·Connect Clock output of PA_02 to WDI.
·Do not Reset using SW1 in ISP mode.
Please include the code below when developing the software.
Main()
{
*(volatile uint32_t *)(0x41001170) = 0x0002; // 8MHz output (125n)
*(volatile uint32_t *)(0x41002008) = 0x0002; // PAD PA_02 use as CLKOUT
….
}
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IOP4IoT W7500
3. Using with another MCU
When using the W7500/W7500P as slave with another master MCU and want to
control W7500/W7500P Reset from the master MCU, connect one of the GPIO of the
master MCU to the RSTN of W7500/W7500P and connect the other GPIO of the
master MCU to the GPIO of W7500/W7500P.
(If there is no need to control W7500/W7500P reset from another master MCU,
please design as 1.Default)
Authorize Reset using the GPIO(output) of the MCU and check if the GPIO(input) of
W7500/W7500P is operating.
Set the GPIO(PA_02 in below example case) of W7500 as ‘high’ when developing the
software.
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