Clarification of MOD5234 I2C pins
Posted: Thu Jul 01, 2010 9:03 am
Are these pinout labels correct?
The datasheet for MOD5234 identifies pins 39 and 42 as follows:
Pin Function Alt Fct. GPIO Port Description
39 I2C_SDA CAN0RX PFEC12C1 Data Bus - I2C Data Line or CAN 0 Transmit
42 I2C_SCL CAN0TX PFECI2C0 Data Bus - I2C Clock Line
Note that Alt Fct. for 39 is "RX", but the Description says "Transmit". Possibly the description is wrong, but the MOD5234 reference manual shows these lines on page 12-2. Here I2C_SCL is associated with CAN0RX and PFECI2C[1] instead of CAN0TX and PFECI2C[0] as shown in the pinout:
PORT
FECI2C <---->
I2C_SCL / CAN0RX / PFECI2C[1]
I2C_SDA / CAN0TX / PFECI2C[0]
and this on page 12-7 under I2C (agrees with the Netburner pinout labels but not Description):
I2C_SDA PFECI2C1 CAN0RX
I2C_SCL PFECI2C0 CAN0TX
The datasheet for MOD5234 identifies pins 39 and 42 as follows:
Pin Function Alt Fct. GPIO Port Description
39 I2C_SDA CAN0RX PFEC12C1 Data Bus - I2C Data Line or CAN 0 Transmit
42 I2C_SCL CAN0TX PFECI2C0 Data Bus - I2C Clock Line
Note that Alt Fct. for 39 is "RX", but the Description says "Transmit". Possibly the description is wrong, but the MOD5234 reference manual shows these lines on page 12-2. Here I2C_SCL is associated with CAN0RX and PFECI2C[1] instead of CAN0TX and PFECI2C[0] as shown in the pinout:
PORT
FECI2C <---->
I2C_SCL / CAN0RX / PFECI2C[1]
I2C_SDA / CAN0TX / PFECI2C[0]
and this on page 12-7 under I2C (agrees with the Netburner pinout labels but not Description):
I2C_SDA PFECI2C1 CAN0RX
I2C_SCL PFECI2C0 CAN0TX