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參數(shù)資料
型號: W83877AF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設(shè)及接口
英文描述: Multi-Function I/O Port Controller(多功能輸入/輸出口控制器)
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封裝: QFP-100
文件頁數(shù): 73/171頁
文件大小: 1634K
代理商: W83877AF
W83877AF
Publication Release Date: Sep. 1996
Preliminary Version 0.50
- 71 -
4.3.7.2 Set5.Reg2 - Flow Control mode Operation (FC_MD)
These registers control flow control mode operation as shown below table.
Reg.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
FC_MD
FC_MD2
FC_MD1
FC_MD0
-
FC_DSW
EN_FD
EN_BRFC
EN_FC
Reset Value
0
0
0
0
0
0
0
0
Bit 7~5
FC_MD2 - Flow Control mode
When occurs flow control state, these bits will be loaded to AD_MD2~0 of advanced HSR
(Handshake Status Register). These three bits defined are same as AD_MD2~0.
Reserved
, write 0.
Bit 4:
Bit 3:
FC_DSW - Flow Control DMA Channel Swap
Write to 1, when occurs flow control state, enable to swap DMA channel of both
transmitter and receiver.
FC_DSW
Next Mode After Flow Control Occurred
0
Receiver Channel
Transmitter Channel
1
Bit 2:
EN_FD - Enable Flow DMA Control
Write to 1, then enable to use DMA channel when flow control is occurred.
Bit 1:
EN_BRFC - Enable Baud Rate Flow Control
Write to 1 then enable FC_BLL/FC_BHL (Flow Control Baud Rate Divider Latch, in
Set5.Reg1~0) to be loaded to advanced baud rate divisor latch (ADBLL/ADBHL, in
Set2.Reg1~0).
Bit 0:
EN_FC - Enable Flow Control
Write to 1 then can use flow control function and bit 7~1 of this register can be activated.
4.3.7.3 Set5.Reg3 - Sets Select Register (SSR)
Write this register then change Set of register. Read this register will return EC
16
.
Reg.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SSR
SSR7
SSR6
SSR5
SSR4
SSR3
SSR2
SRR1
SRR0
default Value
1
1
1
0
1
1
0
0
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