- 您現在的位置：買賣IC網 > PDF目錄363895 > W77C32 (WINBOND ELECTRONICS CORP) 8 BIT MICROCONTROLLER PDF資料下載
參數資料
| 型號： | W77C32 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數： | 39/71頁 |
| 文件大小： | 860K |
| 代理商： | W77C32 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁當前第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁
Preliminary W77C32
Publication Release Date: March 1999
- 39 - Revision A1
Wait State Control Signal
Either with the software using stretch value to change the required machine cycle of MOVX
instruction, the W77C32 provides another hardware signal
WAIT
to implement the wider duration of
external data access timing. This wait state control signal is the alternate function of P4.0 such that it
can only be invoked to 44-pin PLCC/QFP package type. The wait state control signal can be enabled
by setting WS (ROMMAP.7) bit. When enabled, the setting of stretch value decides the minimum
length of MOVX instruction cycle and the device will sample the
WAIT
pin at each C3 state before
the rising edge of read/write strobe signal during MOVX instruction. Once this signal being
recongnized, one more machine cycle (wait state cycle) will be inserted into next cycle. The inserted
wait state cycles are unlimited, so the MOVX instruction cycle will end in which the wait state control
signal is deactivated. Using wait state control signal allows a dynamically access timimg to a selected
external peripheral. The WS bit is accessed by the Timed Access Protection procedure.
Wait State Control Signal Timing (
when Stretch = 1 )
C2 C3
C4
C1
CLOCK
ALE
PSEN
ADDRESS
RD / WR
C2 C3
C4
C1
C2 C3 C4
C1
C2 C3
C4
C1
C2 C3 C4
C1
MOVX Instruction
Cycle
SCycle
WCycle
Third
WAIT
sample
WAIT
sample WAIT
Extended duration
original rising edge
Wait State Control Signal Timing (
when Stretch = 2 )
C2 C3
C4
C1
CLOCK
ALE
PSEN
ADDRESS
RD / WR
C2 C3
C4
C1
C2 C3
C4
C1
C2 C3
C4
C1
C3
C4
C2
C1
MOVX Instruction
MCycle
SCycle
WCycle
Third
WAIT
sample
WAIT
sample WAIT
Extended duration
original rising edge
C2
C1
Fourth
相關PDF資料 |
PDF描述 |
|---|---|
| W77C58 | 8 BIT MICROCONTROLLER |
| W77E058A40DL | 8-BIT MICROCONTROLLER |
| W77E058A40FL | 8-BIT MICROCONTROLLER |
| W77E058A40PL | 8-BIT MICROCONTROLLER |
| W77E058A | 8-BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W77C32_07 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77C32-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77C32-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77C32F-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77C32F-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
發布緊急采購，3分鐘左右您將得到回復。