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参数资料
| 型号： | SST89V54RDA-33-C-QIF |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, QCC40 |
| 封装： | ROHS COMPLIANT, MO-220IWJJD-5, WQFN-40 |
| 文件页数： | 21/84页 |
| 文件大小： | 1755K |
| 代理商： | SST89V54RDA-33-C-QIF |
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28
Data Sheet
FlashFlex MCU
SST89E54RD2A/RDA / SST89E58RD2A/RDA
SST89V54RD2A/RDA / SST89V58RD2A/RDA
2007 Silicon Storage Technology, Inc.
S71339-01-000
1/07
Symbol
Function
EXTRAM
Internal/External RAM access
0: Internal Expanded RAM access within range of 00H to 2FFH using MOVX @Ri /
@DPTR. Beyond 300H, the MCU always accesses external data memory.
For details, refer to Section 3.4, “Expanded Data RAM Addressing” .
1: External data memory access.
AO
Disable/Enable ALE
0: ALE is emitted at a constant rate of 1/3 the oscillator frequency in 6 clock mode, 1/6 fOSC in
12 clock mode.
1: ALE is active only during a MOVX or MOVC instruction.
Symbol
Function
GF2
General purpose user-defined flag.
DPS
DPTR registers select bit.
0: DPTR0 is selected.
1: DPTR1 is selected.
Symbol
Function
WDOUT
Watchdog output enable.
0: Watchdog reset will not be exported on Reset pin.
1: Watchdog reset if enabled by WDRE, will assert Reset pin for 32 clocks.
WDRE
Watchdog timer reset enable.
0: Disable watchdog timer reset.
1: Enable watchdog timer reset.
WDTS
Watchdog timer reset flag.
0: External hardware reset or power-on reset clears the flag.
Flag can also be cleared by writing a 1.
Flag survives if chip reset happened because of watchdog timer overflow.
1: Hardware sets the flag on watchdog overflow.
WDT
Watchdog timer refresh.
0: Hardware resets the bit when refresh is done.
1: Software sets the bit to force a watchdog timer refresh.
SWDT
Start watchdog timer.
0: Stop WDT.
1: Start WDT.
Auxiliary Register (AUXR)
Location
76543210
Reset Value
8EH
------
EXTRAM
AO
xxxxxx00b
Auxiliary Register 1 (AUXR1)
Location
76543210
Reset Value
A2H
----
GF2
0
-
DPS
xxxx00x0b
Watchdog Timer Control Register (WDTC)
Location
76543210
Reset Value
C0H
-
WDOUT
WDRE
WDTS
WDT
SWDT
xxx00000b
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相关代理商/技术参数 |
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| SST89V554 | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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