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6 port 6, 1 port 6 data direction register (p6ddr) – Renesas H8S/2111B User Manual

Page 146

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Rev. 1.00, 05/04, page 112 of 544

• P50/ExTxD1

The pin function is switched as shown below according to the combination of the TE bit in
SCR of SCI_1, the SPS1 bit* in SPSR, and the P50DDR bit.

SPS1* 0

1

TE — 0

1

P50DDR 0 1

0

1

Pin Function

P50 input pin

P50 output pin

P50 input

pin

P50 output

pin

ExTxD1

output pin*

Note: * The program development tool (emulator) does not support this function.

7.6 Port

6

Port 6 is an 8-bit I/O port. Port 6 pins also function as the FRT I/O pins, TMR_X I/O pins,
TMR_Y input pin, key-sense interrupt input pins, and interrupt input pins. Port 6 has the following
registers.

• Port 6 data direction register (P6DDR)
• Port 6 data register (P6DR)
• Port 6 pull-up MOS control register (KMPCR)
• System control register 2 (SYSCR2)

7.6.1

Port 6 Data Direction Register (P6DDR)

P6DDR specifies input or output for the pins of port 6 on a bit-by-bit basis.

Bit Bit

Name

Initial
Value R/W Description

7 P67DDR

0 W

6 P66DDR

0 W

5 P65DDR

0 W

4 P64DDR

0 W

3 P63DDR

0 W

2 P62DDR

0 W

1 P61DDR

0 W

0 P60DDR

0 W

The corresponding port 6 pins are output ports when
P6DDR bits are set to 1, and input ports when cleared
to 0.

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