TC9256, 57APG/AFG

2006-07-14

15

General-Purpose I/O Ports

These LSIs feature general-purpose output and I/O ports that are controlled through the serial ports.

Input/Output Form

TC9256APG, TC9256AFG

TC9257APG, TC9257AFG

Input/Output Configuration

Output ports

Dedicated: 3 ports

Maximum: 4 ports

(1 port for CMOS output)

Dedicated: 4 ports

N-channel open-drain output

I/O ports

Maximum: 2 ports

Dedicated: 1 port

Maximum: 5 ports

CMOS input/output

1.

General-Purpose Output Ports (OT-1to OT-4)

Pins OT-1to OT-4 are general-purpose dedicated output ports used for control signal output. They are

configured for N-channel open-drain output and have an off withstanding voltage of 12 V.

The data set in bits O1to O4 of the input register (D2H) are output in parallel from their corresponding

dedicated output port pins OT-1to OT-4. The TC9256APG and TC9256AFG do not have the dedicated

output port OT-4, but setting the input register (D2H) CLK (O4C) bit to “1” converts pin DO2 into an output

port OT-4 (configured for CMOS output).

The data set in bits O1to O4 of the input register (D2H) can also be read from the DATA pins as output

register (D3H) serial data O1to O4.

(1)

TC9257APG and TC9257AFG

(2)

TC9256APG and TC9256AFG

Note 1: Bit names in parentheses “(

)” apply to the TC9256APG and TC9256AFG.

Note 2: (*1) indicates the output state when the DO2/OT-4 pin is switched for use as an OT-4 output pin

(configured for CMOS output).