HD64F2149 Datasheet, PDF (281/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.12 Port B
8.12.1 Overview
Port B is an 8-bit I/O port. Port B pins also have host interface (XBS) input/output pins (CS3,
CS4, HIRQ3, HIRQ4), host interface (LPC) input/output pins (LSCI, LSMI), wakeup event
interrupt input pins (WUE7 to WUE0), and a data bus input/output function (as D7 to D0). The
pin functions depend on the operating mode.
Figure 8.19 shows the port B pin configuration.
Port B
Port B pins
PB7/D7/WUE7
PB6/D6/WUE6
PB5/D5/WUE5
PB4/D4/WUE4
PB3/D3/WUE3/CS4
PB2/D2/WUE2/CS3
PB1/D1/WUE1/HIRQ4/LSCI
PB0/D0/WUE0/HIRQ3/LSMI
Modes 1, 2, and 3 (EXPE = 1) when ABW = 0
D7 (I/O)
D6 (I/O)
D5 (I/O)
D4 (I/O)
D3 (I/O)
D2 (I/O)
D1 (I/O)
D0 (I/O)
Modes 1, 2, and 3 (EXPE = 1) when ABW = 1,
and modes 1, 2, and 3 (EXPE = 0)
PB7 (I/O)/WUE7 (Input)
PB6 (I/O)/WUE6 (Input)
PB5 (I/O)/WUE5 (Input)
PB4 (I/O)/WUE4 (Input)
PB3 (I/O)/WUE3 (Input)/CS4 (Input)
PB2 (I/O)/WUE2 (Input)/CS3 (Input)
PB1 (I/O)/WUE1 (Input)/HIRQ4 (Output)/LSCI (I/O)
PB0 (I/O)/WUE0 (Input)/HIRQ3 (Output)/LSMI (I/O)
Figure 8.19 Port B Pin Functions
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