HD6432621 Hitachi, HD6432621 Datasheet - Page 317

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

9.10
9.10.1
Port F is an 8-bit I/O port. Port F pins also function as external interrupt input pins (IRQ2 and
IRQ3), BUZZ output pin*, A/D trigger input pin (ADTRG), bus control signal input/output pins
(AS, RD, HWR, LWR, WAIT, BREQO, BREQ, and BACK) and the system clock (ø) output pin.
Note: * BUZZ output pin in the H8S/2626 Series only.
Figure 9-9 shows the port F pin configuration.
Note: * BUZZ output pin in the H8S/2626 Series only.
Port F
Port F
Overview
Port F pins
PF7 /ø
PF6 /AS
PF5 /RD
PF4 /HWR
PF3 /LWR/ADTRG/IRQ3
PF2 /WAIT/BREQO
PF1 /BACK/BUZZ *
PF0 /BREQ/IRQ2
Figure 9-9 Port F Pin Functions
Pin functions in modes 4 to 6
PF7 (input) / ø (output)
AS (output)
RD (output)
HWR (output)
PF3 (I/O) / LWR (output) / ADTRG (input) / IRQ3 (input)
PF2 (I/O) / WAIT (input) / BREQO (output)
PF1 (I/O) / BACK (output) / BUZZ (output) *
PF0 (I/O) / BREQ (input) / IRQ2 (input)
Pin functions in mode 7
PF7
PF6
PF5
PF4
PF3
PF2
PF1
PF0
(input) / ø (output)
(I/O)
(I/O)
(I/O)
(I/O) / ADTRG (input) / IRQ3 (input)
(I/O)
(I/O) / BUZZ (output) *
(I/O) / IRQ2 (input)
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