H8SSLASH2224 datasheet(410/1071 Pages) RENESAS

410 / 1071 page

Section 10 I/O Ports

Rev. 5.00 Aug 08, 2006 page 324 of 982

REJ09B0054-0500

10.4.4

Pin Functions

Port 7 pins also function as TMR I/O pins (TMR_0, TMR_1, TMR_2*1, and TMR_3*1), bus

control output pin, SCI I/O pins, and DMAC*2 I/O pins. Values of the register and pin functions

are shown below.

Notes: 1. Not available in the H8S/2237 Group and H8S/2227 Group.

2. Supported only by the H8S/2239 Group.

• P77/TxD3

The pin functions are switched as shown below according to the combination of the TE bit in

SCR_3 of SCI_3 and the P77DDR bit.

P77DDR



Pin functions

P77 input pin

P77 output pin

TxD3 output

• P76/RxD3

The pin functions are switched as shown below according to the combination of the RE bit in

SCR_3 of SCI_3 and the P76DDR bit.

P76DDR



Pin functions

P76 input pin

P76 output pin

RxD3 Input

• P75/TMO3/SCK3

The pin functions are switched as shown below according to the combination of OS3 to OS0

bits in TCSR_3 of TMR_3*, CKE1 and CKE0 bits in SCR_3 of SCI_3, the C/A bit in SMR_3,

and the P75DDR bit.

OS3 to OS0*

All bits are 0

Any bit is 1

CKE1





CKE0





P75DDR



Pin functions

P75 input

P75 output

SCK3 output

SCK3 input

TMO3*

output pin

Note:

* Not available in the H8S/2237 Group and H8S/2227 Group.

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