3069RF-ZTAT Datasheet, PDF (327/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Table 8.23 Port B Pin Functions (Modes 1 to 5)
Pin
PB /TP /
7
15
RxD
2
Pin Functions and Selection Method
Bit RE in SCR of SCI2, bit SMIF in SCMR, bit NDER15 in NDERB, and bit PB DDR select the pin function as
7
follows.
SMIF
RE
PB DDR
7
NDER15
Pin function
0
—
PB input
7
0
0
1
1
0
1
PB output
7
TP output
15
1
—
—
RxD input
2
1
—
—
—
RxD input
2
PB /TP /
6
14
TxD
2
Bit TE in SCR of SCI2, bit SMIF in SCMR, bit NDER14 in NDERB, and bit PB DDR select the pin function as
6
follows.
SMIF
0
1
TE
0
1
—
PB DDR
6
NDER14
0
1
—
0
1
—
—
1
—
—
Pin function
PB input
6
PB output
6
TP output
14
TxD output TxD output*
2
2
Note: * Functions as the TxD output pin, but there are two states: one in which the pin is driven, and another
2
in which the pin is at high-impedance.
PB /TP / Bit C/A in SMR of SCI2, bits CKE0 and CKE1 in SCR, bit NDER13 in NDERB, and bit PB DDR select the pin
5
13
5
SCK /LCAS function as follows.
2
CKE1
0
1
C/A
0
1
—
CKE0
0
1
—
—
PB DDR
5
NDER13
0
1
1
—
—
—
—
0
1
—
—
—
Pin function
PB input
5
PB output
5
TP output SCK output SCK output SCK input
13
2
2
2
LCAS output*
Note: * LCAS output depending on bits DRAS2 to DRAS0 in DRCRA and bit CSEL in DRCRB, and
regardless of bits C/A, CKE0 and CKE1, NDER13, and PB DDR. For details, see section 6, Bus
5
Controller.
PB /TP / Bit NDER12 in NDERB and bit PB DDR select the pin function as follows.
4
12
4
UCAS
PB DDR
4
0
1
1
NDER12
—
0
1
Pin function
PB input
4
PB output
4
UCAS output*
TP output
12
Note: * UCAS output depending on bits DRAS2 to DRAS0 in DRCRA and bit CSEL in DRCRB, and
regardless of bits NDER12 and PB DDR. For details, see section 6, Bus Controller.
4
Rev. 5.0, 09/04, page 305 of 978