HD64F2145 datasheet(208/829 Pages) RENESAS

208 / 829 page

Rev. 2.0, 08/02, page 168 of 788

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

P37PCR

R/W

P36PCR

R/W

P35PCR

R/W

P34PCR

R/W

P33PCR

R/W

P32PCR

R/W

P31PCR

R/W

P30PCR

R/W

In modes 2 and 3 (when EXPE = 0), the input pull-

up MOS is turned on when a P3PCR bit is set to 1

in the input port state.

The input pull-up MOS function cannot be used

when the host interface is enabled.

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

Not all 0

HI12E

P3nDDR

—

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.

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