HD64F3039F18 Datasheet, PDF(206/710 Page) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

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HD64F3039F18 Datasheet, PDF (206/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

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Section 7 I/O Ports

7.11 Port B

7.11.1 Overview

Port B is a 7-bit input/output port that is also used for TPC output (TP15, TP13 to TP8), ITU

input/output (TIOCB4, TIOCB3, TIOCA4, TIOCA3) and ITU output (TOCXB4, TOCXA4), and

ADTRG input to the A/D converter. Port B has the same set of pin functions in all operating

modes. Figure 7.23 shows the pin configuration of port B.

Pins in port B can drive one TTL load and a 30-pF capacitive load. They can also drive an LED or

a Darlington transistor pair. Pins PB3 to PB0 have Schmitt-trigger inputs.

Port B pins

Port B

PB 7 (input/output)/TP15(output)/ADTRG (input)

PB 5 (input/output)/TP13(output)/TOCXB 4 (output)

PB 4 (input/output)/TP12(output)/TOCXA 4 (output)

PB 3 (input/output)/TP11(output)/TIOCB 4 (input/output)

PB 2 (input/output)/TP10(output)/TIOCA 4 (input/output)

PB 1 (input/output)/TP9 (output)/TIOCB 3 (input/output)

PB 0 (input/output)/TP8 (output)/TIOCA 3 (input/output)

Figure 7.23 Port B Pin Configuration

7.11.2 Register Descriptions

Table 7.17 summarizes the registers of port B.

Table 7.17 Port B Registers

Address* Name

Abbreviation

R/W

H'FFD4

Port B data direction register

PBDDR

W

H'FFD6

Port B data register

PBDR

R/W

Note: * Lower 16 bits of the address.

Rev.3.00 Mar. 26, 2007 Page 182 of 682

REJ09B0353-0300

Initial Value

H'00

H'00

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