HD6432142 datasheet(280/1177 Pages) RENESAS

Part #	HD6432142

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1177 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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280 / 1177 page

Section 8 I/O Ports

Rev. 4.00 Sep 27, 2006 page 236 of 1130

REJ09B0327-0400

8.4.3

Pin Functions in Each Mode

Modes 1, 2, and 3 (EXPE = 1)

In modes 1, 2, and 3 (when EXPE = 1), port 3 pins automatically function as data I/O pins. The

port 3 pin functions are shown in figure 8.10.

D15 (I/O)

D14 (I/O)

D13 (I/O)

D12 (I/O)

D11(I/O)

D10 (I/O)

D9 (I/O)

D8 (I/O)

Port 3

Figure 8.10 Port 3 Pin Functions (Modes 1, 2, and 3 (EXPE = 1))

Modes 2 and 3 (EXPE = 0)

In modes 2 and 3 (when EXPE = 0), port 3 functions as host interface data bus I/O pins (HDB7 to

HDB0) or as I/O ports. When the HI12E bit is set to 1 in SYSCR2 and a transition is made to

slave mode, port 3 functions as the host interface data bus. In slave mode, P3DR and P3DDR

should be cleared to H'00. When the HI12E bit is cleared to 0, port 3 functions as an I/O port, and

input or output can be specified on a bit-by-bit basis. When a bit in P3DDR is set to 1, the

corresponding pin functions as an output port, and when cleared to 0, as an input port.

The port 3 pin functions are shown in figure 8.11.

HD6432142 Datasheet(PDF) 280 Page - Renesas Technology Corp