FUJITSU MB91F109 FR30 User Manual

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5.4 Using External Pins as I/O Ports

PB5

PB5/DREQ2

DSCR (C1LE)
0: PB5
1: CS1L
Pin values are always input to
DESQ2.

CS1L

DREQ2

PB6

DSCR (C1HE bit) and DATCR
(AKSE2, AKDE2 bits)
C1HE, AKSE2, AKDE2 000: PB6
100: CS1H
Other: DACK2

CS1H

DACK2

PB7

DSCR(DW1E)
0: PB7
1: DW1X

DW1X

19 to 21

MD0 to MD2

NMIX

75 to 78

AN0 to AN3

AIC (AI0 to AI3 bits)
0: AN0 to AN3
1: setting not possible

98 to 97

PE0 to PE1

PE0/INT0 to PE1/

INT1

Pin values are always input to INT0 to
INT1.

INT0 to INT1

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

Pin No.

Pin code

Initial value

Switch-over register

Table 5.4-3 External Bus Functions to be Selected (3/4)

Pin No.

Pin code

Initial value

Switch-over register

92 to 91

PE2 to PE3

PE2/INT2 to PE3/

INT3

SMR (SCKE)
0: pin values are input to SC1 and
SC2.
1: SC1 and SC2 (output)

INT2 to INT3

SC1 to SC2

90 to 89

PE4 to PE5

PE4/DREQ0 to PE5/

DREQ1

Pin values are always input to DREQ0
and DREQ1.

DREQ0, DREQ1

88 to 87

PE6 to PE7

DATCR (AKSE0/1, AKDE0/1)
0: PE6, PE7
1: DACK0, DACK1

DACK0, DACK1

PF0

PF0/SI0/TRG0

Pin values are always input to SI0 and
TRG0 (during operation).

TRG0

SI0

PF1

PF1/TRG1

SMR (SOE)
0: PF1
1: SO0 (output)
Pin values are always input to TRG1
(during operation).

TRG1

SO0