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MSP430FR2476: MSP430FR2476TPT: configuring I2C on Port 4

Paul Carson1
Prodigy 210 points
Part Number: MSP430FR2476
Other Parts Discussed in Thread: MSP430F2330

I'm trying to configure the UCB1 I2C port on pins P4 (pins 8 & 9) on a MSP430FR2476TPT device.

Datasheet SLASEO7B Table 4-2 states this is feasible on the PT package.

I have tried:

SYSCFG3 |= USCIB1RMP;
P4SEL0 = 0x18;
P4SEL1 = 0x00;

It does not appear to clock the SCL/SDA pins.

I have also tried

P4SEL0 = 0x00;
P4SEL1 = 0x18;

P4SEL0 = 0x18;
P4SEL1 = 0x18;

still get nothing out. The code to drive data has been used on our old product with an MSP430F2330 without issue. I ahve updated the register from UCB1CTL1 to UCB1CTLW0.

NOTE: The datasheet disagrees with CCS10.3.1 (USCIB1RMP in SYSCFG3 whereas datasheet states SYSCFG2).

Any help appreciated thanks.

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