HD6413002 Datasheet, PDF(283/700 Page) Renesas Technology Corp – High-performance single-chip microcontroller

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HD6413002 Datasheet, PDF (283/700 Pages) Renesas Technology Corp – High-performance single-chip microcontroller

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9.8 Port B

9.8.1 Overview

Port B is an 8-bit input/output port that is also used for TPC output (TP15 to TP8), ITU

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

input (DREQ1, DREQ0), and ADTRG input to the A/D converter. Port B has the same set of pin

functions in all operating modes. Figure 9-9 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 a 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)/DREQ1 (input)/ADTRG (input)

PB 6 (input/output)/TP14 (output)/DREQ0 (input)

PB 5 (input/output)/TP13 (output)/TOCXB4 (output)

PB 4 (input/output)/TP12 (output)/TOCXA4 (output)

PB 3 (input/output)/TP11 (output)/TIOCB4 (input/output)

PB 2 (input/output)/TP10 (output)/TIOCA4 (input/output)

PB 1 (input/output)/TP9 (output)/TIOCB3 (input/output)

PB 0 (input/output)/TP8 (output)/TIOCA3 (input/output)

Figure 9-9 Port B Pin Configuration

9.8.2 Register Descriptions

Table 9-13 summarizes the registers of port B.

Table 9-13 Port B Registers

Address*

Name

H'FFD4

Port B data direction register

H'FFD6

Port B data register

Note: * Lower 16 bits of the address.

Abbreviation

PBDDR

PBDR

R/W Initial Value

W

H'00

R/W H'00

269

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