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參數資料
型號: W6692
廠商: WINBOND ELECTRONICS CORP
元件分類: 通信及網絡
英文描述: PCI Bus ISDN S/T Interface Controller(PCI總線的ISDN S/T接口控制器)
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP100
封裝: 14 X 20 MM, 2.75 MM HEIGHT, QFP-100
文件頁數: 53/84頁
文件大小: 473K
代理商: W6692
W6692
Publication Release Date: October 1998
- 53 -
Revision A1
TMD Timer 2 Mode
0: One shot count down mode. The timer starts when it is written a non-zero count value and stops
when it reaches zero.
1: Cyclic timer mode. The timer starts when it is written a non-zero count value and counts
cyclically (periodically) with the count value.
In both cases, a maskable interrupt TIN2 is generated and TOUT2 pin toggles every time the timer
reaches zero. When timer starts, TOUT2 changes to LOW and toggles at timer expiration. Therefore,
the period of TOUT2 is twice of count value.
In both cases, timer counts with the new value if it is written again before expiration.
TCN5-0 Timer 2 Count Value
0: Timer is off.
1-31: Timer count value in unit of mS.
8.1.21 Layer 1_Ready Code
L1_RC Read/Write
Address 50H
Value after reset: 0CH
7
6
5
4
3
2
1
0
RC3
RC2
RC1
RC0
RC3-0 Ready Code
When GCI bus is being enabled, these four programmable bits are allowed to program different Layer
1_Ready Code (AI: Activation Indication) by user. For example: Siemens PEB2091: AI = 1100,
Motorola MC145572: AI = 1100.
8.1.22 D_ch Control Register D_CTL Read/Write
Address 54H
Value after reset: 00H
7
6
5
4
3
2
1
0
WTT1
WTT2
SRST
TPS
OPS1
OPS0
WTT1, 2 Watchdog Timer Trigger 1, 2
When the watchdog timer has enabled (D_MODE: TEE = 1 and D_CTL: TPS = 1), the micro-
processor has to program the WTT1, 2 bits in the following sequences within 1024 mS to reset and
restart the timer. Otherwise, the timer will expire after 1024 mS and a WEXP interrupt together with a
125
μ
S reset pulse on TRST pin are generated:
SEQUENCE
1
2
WTT1
1
0
WTT2
0
1
Switching TPS bit from 0 to 1 or from 1 to 0 resets the watchdog timer.
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