SCN2652AC2N40 查看數據表（PDF） - Philips Electronics

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SCN2652AC2N40

Multi-protocol communications controller(MPCC)

Philips Electronics 

Philips Semiconductors

Multi-protocol communications controller (MPCC)

Product specification

SCN2652/SCN68652

Table 4. MPCC Register Addressing

A2

A1

A0 REGISTER

Byte = 0

(16-Bit Data Bus = DB15 – DB00)

0

0

X

0

1

X

1

0

X

1

1

X

RDSR

TDSR

PCSAR

PCR*

Byte = 1 (8-Bit Data Bus = DB7–0 or DB15–8**)

0

0

0

RDSRL

0

0

1

RDSRH

0

1

0

TDSRL

0

1

1

TDSRH

1

0

0

PCSARL

1

0

1

PCSARH

1

1

0

PCRL*

1

1

1

PCRH

NOTES:

* PCR lower byte does not exist. It will be all “0”s when read.

** Corresponding high and low order pins must be tied together.

Table 5.

BIT

00–07

08–10

Parameter Control Register (PCR)–(R/W)

NAME

MODE

FUNCTION

Not Defined

RxCL

BOP/BCP

Receiver character length is loaded by the processor when RxCLE = 0. The character length is

valid after transmission of single byte address and control fields have been received.

11

12

13–15

RxCLE

TxCLE

TxCL

BOP/BCP

BOP/BCP

BOP/BCP

10

9

0

0

0

0

0

1

0

1

1

0

1

0

1

1

1

1

8

Char length (bits)

0

8

1

1

0

2

1

3

0

4

1

5

0

6

1

7

Receiver character length enable should be zero when the processor loads RxCL. The

remaining bits of PCR are not affected during loading. Always 0 when read.

Transmitter character length enable should be zero when the processor loads TxCL. The

remaining bits of PCR are not affected during loading. Always 0 when read.

Transmitter character length is loaded by the processor when TxCLe = 0. Character bit length

specification format is identical to RxCL. It is valid after transmission of single byte address and

control fields.

1995 May 01

13

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