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參數資料
| 型號： | W77IC32-25 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, 25 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數： | 39/70頁 |
| 文件大小： | 375K |
| 代理商： | W77IC32-25 |
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Preliminary W77IC32
Publication Release Date: March 2000
- 39 - Revision A0
Wait State Control Signal
Either with the software using stretch value to change the required machine cycle of MOVX
instruction, the W77IC32 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
MFirst
Cycle
SCycle
Wait-State
Cycle
Third
WAIT
sample
WAIT
sample WAIT
Extended duration
original rising edge
C2
C1
Cycle
Fourth
相關PDF資料 |
PDF描述 |
|---|---|
| W77IC32P-25 | 8 BIT MICROCONTROLLER |
| W77IE58 | 8-BIT MICROCONTROLLER |
| W77L32 | 8-BIT MICROCONTROLLER |
| W77LE532 | 8 BIT MICROCONTROLLER |
| W77LE58 | 8 BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W77IC32A25DL | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77IC32A25PL | 功能描述:IC MCU 8-BIT 1K SRAM 44-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W77 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設備:POR，PWM，WDT 輸入/輸出數:40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數據轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| W77IC32P-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77IE58 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77IE58_06 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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