Zilog Z16C30 Manual do Utilizador descarregar pdf (Página 190)

8-35

Z16C30 USC

USER'S MANUAL

ZILOG

UM97USC0100

"TxFIFO Status" if last TCSR15-12 command 4-7 was 5

"Tx/Int level" if last TCSR15-12 command 4-7 was 6

"TxREQ level" if last TCSR15-12 command 4-7 was 7

Transmit Interrupt Control Register (TICR) Register Address 0 b 11011

Pre

Sent IA

Bit(s)

Field/Bit

Name

Conditions

/Context

Description

Status

Ref Chapter: Section

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

Idle

Sent

Abort

Sent

EOF/

EOM

Sent IA

CRC

Sent

Wait2

Send

Under

TC1R

Sel

TICR15-8 the number of empty character/byte/octet

entries in the TxFIFO, above which to request

Transmit DMA transfer

RW 6: DMA Requests by the

Receiver and Transmitter

7 written to

TCmd

(TCSR15-

12) since 5

or 6 written

there

TICR15-8 the number of empty character/byte/octet entries

in the TxFIFO, above which to request a Transmit

Data Interrupt

RW 7: Transmit Data interrupts

6 written to

TCmd

(TCSR15-

12) since 5

or 7 written

there

TICR15-8 the number of empty character/byte/octet entries

currently in the TxFIFO

RO 5:The Data Registers

and the FIFOs

5 written to

TCmd

(TCSR15-

12), or

Reset,

since 6 or 7

written

there

TICR7 1=arm interrupts on Preamble Sent (TCSR7) RW 7: Transmit Status Interrupt

Sources and IA Bits

PreSent IA

TICR6 1=arm interrupts on IdleSent (TCSR6)IdleSent IA

TICR5 1=arm interrupts on AbortSent (TCSR5)AbortSent

TICR4 1=arm interrupts on EOF/EOM Sent (TCSR4)EOF/EOM

Sent IA

TICR3 1=arm interrupts on CRCSent (TCSR3)CRCSent IA

5: Synchronizing Frames/

Messages with Software

Response

TICR2 1=hold Transmitter from sending each

frame/message until software issues "Send

Message/Frame" command

Wait2Send

7: Transmit Status Interrupt

Sources and IA Bits

TICR1 1=arm interrupts on TxOver (TCSR1) RWTxUnder IA

TICR0 0=select Time Constant value for reading TC1R;

1=capture current count for reading TC1R

RWTC1R Sel 4: Tx and Rx Clocking: The

Baud Rate Generators

Sync

H/SDLC

Sync

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

UM009402-0201

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