FUJITSU MB91F109 FR30 User Manual

Page 230

206

CHAPTER 5 I/O PORTS

P81

EPCR0 (BRE bit)
0: P81
1: BGRNTX

BGRNTX

P82

EPCR0 (BRE bit)
0: P82
1: BRQ

BRQ

P83

EPCR0 (RDXE bit)
0 : P83
1 : RDX

RDX

Table 5.4-1 External Bus Functions to be Selected (1/4)

Pin No.

Pin code

Initial value

Switch-over register

Table 5.4-2 External Bus Functions to be Selected (2/4)

Pin No.

Pin code

Initial value

Switch-over register

26 to 27

P84 to P85

P84, P85

Function automatically switches
according to the mode set by MD0 to
MD2, AMD0 to AMD5, and M0 to M1.
Single chip: P84 and P85
8 bits: WR0X and P85
16 bits: WR0X and WR1X

WR0X, WR1X

14 to 12

PA 0 to PA2

EPCR0 (C0E0 to C0E2 bits)
0: PA0 to PA2
1: CS0X to CS2X

CS0X to CS2X

PA3

EPCR0 (C0E3 bit) and DATCR
(EPSE1 and EPDE1 bits)
COE3, EPSE1, EPDE1 000:PA3
100: CS3X
Others: E0P1

CS3X

E0P1

10 to 9

PA4 to PA5

EPCR0 (C0E4 to C0E5 bits)
0 : PA4 to PA5
1: CS4X to CS5X

CS4X to CS5X

PA6

EPCR0 (CKE bit)
0: PA6
1: CLK

CLK

99 to 100

1 to 2

PB0 to PB3

DSCR (RS0E to DW1E bits)
0: PB0 to PB7
1: RAS0 to DW0X

RAS0

CS0L

CS0H

DW0X

PB4

DSCR (RS1E bit) and DATCR
(EPSE2, EPDE2 bits)
RS1E, EPSE2, EPDE2 000: PB4
100: RAS1
Other: EOP2

RAS1

E0P2