HD64F2145 Datasheet, PDF (208/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.4.3 Port 3 Pull-Up MOS Control Register (P3PCR)
P3PCR controls the port 3 on-chip input pull-up MOSs on a bit-by-bit basis.
Bit Bit Name Initial Value R/W Description
7
P37PCR 0
6
P36PCR 0
5
P35PCR 0
4
P34PCR 0
3
P33PCR 0
R/W In modes 2 and 3 (when EXPE = 0), the input pull-
R/W
up MOS is turned on when a P3PCR bit is set to 1
in the input port state.
R/W
The input pull-up MOS function cannot be used
R/W _{when the host interface is enabled.}
R/W
2
P32PCR 0
R/W
1
P31PCR 0
R/W
0
P30PCR 0
R/W
8.4.4 Pin Functions
• P37/D15/HDB7/SERIRQ*, P36/D14/HDB6/LCLK*, P35/D13/HDB5//5(6(7*,
P34/D12/HDB4//)5$0(*, P33/D11/HDB3/LAD3*, P32/D10/HDB2/LAD2*,
P31/D9/HDB1/LAD1*, P30/D8/HDB0/LAD0*
The pin function is switched as shown below according to the combination of the HI12E bit in
SYSCR2, the LPC3E to LPC1E bits in HICR0 of host interface (LPC), the P3nDDR bit, and
operating mode.
Operating
Mode
Mode 1, 2, 3
(EXPE = 1)
Mode 2, 3 (EXPE = 0)
LPCmE
All 0
All 0
Not all 0
HI12E
0
0
1
0
P3nDDR
—
0
1
—
0
Pin Function
D15 to D8
input/output
pins
P37 to P30
input pins
P37 to P30
output pins
HDB7 to
HDB0
input/output
pins
LPC
input/output
pins
Note:*
The combination of bits not described in the above table must not be used.
m = 3 to 1: LPC input/output pins (SERIRQ, LCLK, /5(6(7, /)5$0(, LAD3 to LAD0)
when at least one of LPC3E to LPC1E is set to 1.
n = 7 to 0
*: Not supported by the H8S/2148B.
Rev. 2.0, 08/02, page 168 of 788