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參數資料
型號: W6690
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Controller(ISDN S/T接口控制器)
中文描述: 綜合業務數字網的S / T接口控制器(綜合業務數字網S / T的接口控制器)
文件頁數: 38/76頁
文件大小: 471K
代理商: W6690
Preliminary W6690
- 38 -
8. REGISTER DESCRIPTIONS
Three 8-bit registers are used by the micro-processor to access the W6690's internal registers,
excluding the PNP ISA control/status registers. The internal registers are accessed by first writing the
address into "Device Address Index register", followed by a number of write and/or read operations.
The "Device Write Data register" is the destination of write data, and the "Device Read Data register"
is the destination of read data.
Table 8.1 Register address map: Device internal registers access control
ADDRESS PINS
(A1A0)
ACCESS
REGISTER NAME
DESCRIPTION
00
W
DEV_ADR
Address index for device's registers
01
W
DEV_WR
Write data for device's registers
10
R
DEV_RD
Read data for device's registers
Table 8.2 Register summary: Device internal registers access control
ADDRESS PINS (A1A0)
R/W
NAME
7
6
5
4
3
2
1
0
00
W
DEV_ADR
01
W
DEV_WR
10
R
DEV_RD
In sections 8.1
8.3, the term "Offset address" means the value that is programmed in the DEV_ADR
register.
8.1 Chip Control and D_ch HDLC Controller
Table 8.3 Register address map: Chip Control and D channel HDLC
OFFSET
ACCESS
REGISTER NAME
DESCRIPTION
00
R
D_RFIFO
D channel receive FIFO
01
W
D_XFIFO
D channel transmit FIFO
02
W
D_CMDR
D channel command register
03
R/W
D_MODE
D channel mode control
04
R/W
D_TIMR
D channel timer control
05
R_clear
ISTA
Interrupt Status Register
06
R/W
IMASK
Interrupt Mask Register
07
R_clear
D_EXIR
D channel extended interrupt
08
R/W
D_EXIM
D channel extended interrupt mask
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