Datasheet

Rev.6.00 Oct.28.2004 page 268 of 1016
REJ09B0138-0600H
Port Description Pins Mode 4*
3
Mode 5*
3
Mode 6 Mode 7
Port F
• 8-bit I/O
port
PF
7
/ø When DDR = 0: input port
When DDR = 1 (after reset): ø output
When DDR =
0 (after reset):
input port
When DDR =
1: ø output
PF
6
/AS
PF
5
/RD
PF
4
/HWR
PF
3
/LWR
AS, RD, HWR, LWR output I/O port
PF
2
/LCAS/WAIT/BREQO 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 output
When RMTS2 to RMTS0= B'001 to B'011,
CW2= 0, and LCASS= 0: LCAS output
PF
1
/BACK
PF
0
/BREQ
When BRLE = 0 (after reset): I/O port
When BRLE = 1: BREQ input, BACK output
Port G
• 5-bit I/O
port
PG
4
/CS0 When DDR = 0*
1
: input port
When DDR = 1*
2
: CS0 output
I/O port
PG
3
/CS1
PG
2
/CS2
PG
1
/CS3
When DDR = 0 (after reset): input port
When DDR = 1: CS1, CS2, CS3 output
PG
0
/CAS DRAM space set: CAS output
Otherwise (after reset): I/O port
Notes: 1. After a reset in mode 6
2. After a reset in mode 4 or 5
3. In ROMless version, only modes 4 and 5 are available.
4. Applies to the on-chip ROM version only.