HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 282

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.11
8.11.1
Port F is an 8-bit I/O port. Port F pins also function as bus control signal input/output pins (AS,
RD, HWR, LWR, WAIT, BREQ, and BACK), the system clock (ø) output pin and interrupt input
pins (IRQ0 to IRQ3).
The interrupt input pins (IRQ0 to IRQ3) are Schmitt-triggered inputs.
Figure 8.23 shows the port F pin configuration.
Note: * Modes 1 to 3 are not available on the F-ZTAT version.
Port F
Overview
Port F
Modes 2, 3, 6, and 7 are not available on the ROMless version.
Port F pins
PF
PF
PF
PF
PF
PF
PF
PF
7
6
5
4
3
2
1
0
/ø
/AS
/RD
/HWR
/LWR/IRQ3
/WAIT /IRQ2
/BACK/IRQ1
/BREQ/IRQ0
Figure 8.23 Port F Pin Functions
Pin functions in modes 1, 2, 4, 5, and 6 *
PF
AS (output)
RD (output)
HWR (output)
LWR (output)
PF
PF
PF
Pin functions in modes 3 and 7 *
PF
PF
PF
PF
PF
PF
PF
PF
7
2
1
0
7
6
5
4
3
2
1
0
(input)/ø(output)
(I/O)/WAIT (input)/IRQ2 (input)
(I/O)/BACK (output)/IRQ1(input)
(I/O)/BREQ (input)/IRQ0 (input)
(input)/ø (output)
(I/O)
(I/O)
(I/O)
(I/O)/IRQ3 (input)
(I/O)/IRQ2 (input)
(I/O)/IRQ1 (input)
(I/O)/IRQ0 (input)
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