W78IRD2 datasheet(21/76 Pages) ETC2

21 / 76 page

W78IRD2

Publication Release Date: October 2, 2006

- 21 -

Revision A7

BIT

NAME

FUNCTION

7, 6

P41FUN1

P41FUN0

P4.1 function control bits, similar to P43FUN1 and P43FUN0 below.

5, 4

P41CMP1

P41CMP0

P4.1 address-comparator length control bits, similar to P43CMP1 and

P43CMP0 below.

3, 2

P40FUN1

P40FUN0

P4.0 function control bits, similar to P43FUN1 and P43FUN0 below.

1, 0

P40CMP1

P40CMP0

P4.0 address-comparator length control bits, similar to P43CMP1 and

P43CMP0 below.

Port 4 Control Register B

Bit:

P43FUN1 P43FUN0 P43CMP1 P43CMP0 P42FUN1 P42FUN0 P42CMP1 P42CMP0

Mnemonic: P4CONB

Address: C3h

BIT

NAME

FUNCTION

7, 6

P43FUN1

P43FUN0

00: Mode 0. P4.3 is a general purpose I/O port, like Port 1.

01: Mode 1. P4.3 is a read-strobe signal for chip-select purposes. The

address range depends on SFR P43AH, P43AL, P43CMP1 and

P43CMP0.

10: Mode 2. P4.3 is a write-strobe signal for chip-select purposes. The

address range depends on SFR P43AH, P43AL, P43CMP1 and

P43CMP0.

11: Mode 3. P4.3 is a read/write-strobe signal for chip-select purposes. The

address range depends on SFR P43AH, P43AL, P43CMP1, and

P43CMP0.

5, 4

P43CMP1

P43CMP0

Chip-select signal address comparison:

00: Compare the full 16-bit address with P43AH and P43AL.

01: Compare the 15 MSB of the 16-bit address with P43AH and P43AL.

10: Compare the 14 MSB of the 16-bit address with P43AH and P43AL.

11: Compare the 8 MSB of the 16-bit address with P43AH.

3, 2

P42FUN1

P42FUN0

P4.2 function control bits, similar to P43FUN1 and P43FUN0 above.

1, 0

P42CMP1

P42CMP0

P4.2 address-comparator length control bits, similar to P43CMP1 and

P43CMP0 above.

W78IRD2 Scheda tecnica(PDF) 21 Page - List of Unclassifed Manufacturers

W78IRD2 Scheda tecnica(HTML) 21 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76

Scheda tecnica Scarica

Link URL