Hitachi H8S/2633 Hardware Manual page 355

Port Description
Port F • 8-bit I/O
port
Port G • 5-bit I/O
port
Notes: 1. After a reset in mode 6
2. After a reset in mode 4 or 5
Pins
PF7 /ø
PF6 /AS/LCAS
PF5 /RD
PF4 /HWR
PF3/LWR/ADTRG/
IRQ3
PF2/LCAS/WAIT/
BREQO
PF1/BACK/BUZZ
PF0/BREQ/IRQ2
PG4 /CS0
PG3 /CS1
PG2 /CS2
PG1 /CS3/ OE/IRQ7
PG0 /CAS/ IRQ6
Mode 4 Mode 5
When DDR = 0: input port
When DDR = 1 (after reset): ø output
RD, HWR, LWR outputs
ADTRG, IRQ3 input
When LCASS = 0: AS output
When RMTS2 to RMTS0 = B'001 to B'011,
CW2 = 0, and LCASS = 1: LCAS output
When WAITE = 0 and BREQOE = 0 (after
reset): I/O port
When WAITE = 1 and BREQOE = 0: WAIT
input
When WAITE = 0 and BREQOE = 1: BREQO
input
When RMTS2 to RMTS0 = B'001 to B'011,
CW2 = 0, and LCASS = 0: LCAS output
When BRLE = 0 (after reset): I/O port
When BRLE = 1: BREQ input, BACK output
BUZZ output, IRQ2 input
1
When DDR = 0* : input port
2 : CS0 output
When DDR = 1*
When DDR = 0 (after reset): input port
When DDR = 1: CS1, CS2, CS3 outputs
OE output, IRQ7 input
DRAM space set: CAS output
Otherwise (after reset): I/O port
IRQ6 input
Mode 6 Mode 7
When
DDR = 0 (after
reset): input
port
When
DDR = 1: ø
output
I/O port
ADTRG, IRQ3
input
I/O port
BUZZ output
IRQ2 input
I/O port
I/O port
I/O port, IRQ7
input
I/O port, IRQ6
input
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