Zilog Z16C30 Bedienungsanleitung PDF herunterladen (Seite 170)

8-15

Z16C30 USC

USER'S MANUAL

ZILOG

UM97USC0100

14 13 12 11 10 9 8 7 6 5 4 3 2 1 015

TxSubMode

Channel Mode Register (CMR) Register Address 0 b 00001

TxMode RxSubMode RxMode

Bit(s)

Field/Bit

Name

Conditions

/Context

Description

Status

Ref Chapter: Section

CMR11-8

Because the content of the SubMode fields depends on the Mode fields, the following descriptions are grouped by mode. TxSubMode

and RxSubMode bits that are not shown for a particular Mode value are Reserved in that mode and should be programmed with zeros.

TxMode 0000=Asynchronous RW 5: Asynchronous Mode

CMR15-14 TxSubMode 00=send one stop bit; 01=two stop bits;

10=1 shaved stop bit (per CCR11-8);

11=2 shaved stop bits

5: External Sync Mode

TxMode=0

CMR13-12 00=16 TxCLKs/Tx bit; 01=32 TxCLKs/Tx bit;

10=64 TxCLKs/Tx bit

CMR3-0 RxMode 0000=Asynchronous RW

CMR5-4 RxSubMode 00=16 RxCLKs/Rx bit; 01=32 RxCLKs/Rx bit;

10=64 RxCLKs/Rx bit

RWRxMode=0

CMR11-8 TxMode 0001=Reserved

CMR3-0 RxMode 0001=External Sync

5: Isochronous ModeCMR11-8 TxMode 0010=Isochronous RW

CMR14 TxSubMode 0=send one stop bit; 1=two stop bits RWTxMode=2CMR14 TxSubMode 0=send one stop bit; 1=two stop bitsTxMode=2

CMR3-0 RxMode 0010=2=Isochronous RW

CMR11-8 TxMode RW0100=4=Monosync 5: Monosync and Bisync

Modes

CMR15 TxSubMode RW1=send CRC on Tx UnderrunTxMode=4

CMR13 1=send Preamble before opening Sync

CMR12 0=send 8-bit Syncs;

1=send Syncs per TxLength

CMR3-0 RxMode RW0100=4=Monosync

CMR5 RxSubMode RWRxMode=4 0=strip received Syncs;

0=include them in RxFIFO and CRC calculation

CMR4 0=expect 8-bit Syncs;

1=expect Syncs per RxLength

RW = Read/Write, RO = Read Only, WO = Write Only – for other codes see p. 8-10.

UM009402-0201

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