HD64F2149 Datasheet, PDF (268/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.10 Port 9
8.10.1 Overview
Port 9 is an 8-bit I/O port. Port 9 pins also function as external interrupt input pins (IRQ0 to
IRQ2), the A/D converter external trigger input pin (ADTRG), host interface (XBS) input pins
(ECS2, CS1, IOW, IOR), the IIC0 I/O pin (SDA0), the subclock input pin (EXCL), bus control
signal I/O pins (AS/IOS, RD, HWR, LWR, WAIT), and the system clock (ø) output pin. P97 is an
NMOS push-pull output. SDA0 is an NMOS open-drain output, and has direct bus drive
capability.
Figure 8.17 shows the port 9 pin configuration.
Port 9
Port 9 pins
P97/WAIT/SDA0
P96/ø/EXCL
P95/AS/IOS/CS1
P94/HWR/IOW
P93/RD/IOR
P92/IRQ0
P91/IRQ1
P90/LWR/IRQ2/ADTRG/ECS2
Pin functions in modes 1, 2 and 3 (EXPE = 1)
WAIT (Input)/P97 (I/O)/SDA0 (I/O)
ø (Output)/P96 (Input)/EXCL (Input)
AS (Output)/IOS (Output)
HWR (Output)
RD (Output)
P92 (I/O)/IRQ0 (Input)
P91 (I/O)/IRQ1 (Input)
P90 (I/O)/LWR (Output)/IRQ2 (Input)/ADTRG (Input)
Pin functions in modes 2 and 3 (EXPE = 0)
P97 (I/O)/SDA0 (I/O)
P96 (Input)/ø (Output)/EXCL (Input)
P95 (I/O)/CS1 (Input)
P94 (I/O)/IOW (Input)
P93 (I/O)/IOR (Input)
P92 (I/O)/IRQ0 (Input)
P91 (I/O)/IRQ1 (Input)
P90 (I/O)/IRQ2 (Input)/ADTRG (Input)/ECS2 (Input)
Figure 8.17 Port 9 Pin Functions
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