Zilog Z16C30 Bedienungsanleitung PDF herunterladen (Seite 171)

8-16

Z16C30 USC

USER'S MANUAL

ZILOG

UM97USC0100

Bit(s)

Field/Bit

Name

Conditions

/Context

Description

Status

Ref Chapter: Section

Channel Mode Register (CMR) (Continued)

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.

CMR11-8 TxMode RW0101=5=Bisync

CMR15 TxSubMode RW1=send CRC on Tx UnderrunTxMode=5

CMR14 0=send closing/idle SYNs from TSR15-8;

1=send closing/idle SYN0/SYN1 (TSR7-0/15-8)

CMR13 1=send Preamble before opening Sync

CMR12 0=send 8-bit Syncs;

1=send Syncs per TxLength

CMR3-0 RxMode RW0101=5=Bisync

CMR5 1=strip received Syncs;

0=include them in RxFIFO and CRC calculation

RxSubMode RxMode=5 RW

CMR4 0=expect 8-bit Syncs;

1=expect Syncs per RxLength

CMR11-8 TxMode 0110=6=HDLC/SDLC RW 5: HDLC/SDLC Mode

CMR7-4 RxSubMode RxMode=6 xx00=no Address or Control field handling;

xx01=1-byte Address only;

x010=1-byte Address, 1-byte Control;

x110=1-byte Address, 2-byte Control;

0011=Extended Address, 1-byte Control;

0111=Extended Address, 2-byte Control;

1011=Extended Address, Control >= 2 bytes;

1111=Extended Address, Control >= 3 bytes

CMR15 TxSubMode 1=send CRC on Tx Underrun

TxMode=7

0=send closing/idle SYNs;

1=send closing/idle DLE-SYNs

CMR14

1=send Preamble before opening DLE-SYNCMR13

0=send ASCII control characters;

1=send EBCDIC

CMR12

CMR3-0 RxMode 0111=7=Transparent Bisync RW

CMR4 RxSubMode 0=look for ASCII control characters;

1=look for EBCDIC

RWRxMode=7

CMR11-8 TxMode 1000=8=Nine Bit RW 5: Nine Bit Mode

CMR15 TxSubMode 0=send 9th bit 0 (data);

1=send 9th bit 1 (address)

RWTxMode=8

0=send eight data bits;

1=send seven data bits plus parity

CMR14

00=16 TxCLKs/Tx bit; 01=32 TxCLKs/Tx bit;

10=64 TxCLKs/Tx bit

CMR13-12

CMR3-0 RxMode 1000=8=Nine Bit RW

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

10=64 RxCLKs/Rx bit

RWRxMode=8

5: Monosync and Bisync

Modes

CMR11-8 TxMode 0111=7=Transparent Bisync RW 5: Transparent Bisync Mode

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

UM009402-0201

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