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參數資料
| 型號： | SX20AC |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
| 中文描述： | 配置通信控制器與電子工程/閃存程序存儲器，在系統(tǒng)編程能力和片上調試 |
| 文件頁數： | 24/52頁 |
| 文件大?。?/td> | 688K |
| 代理商： | SX20AC |
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2000 Scenix Semiconductor, Inc. All rights reserved.
- 24 -
www.scenix.com
SX18AC/SX20AC/SX28AC/SX18AC75/SX20AC75/SX28AC75
10.2
The watchdog logic consists of a Watchdog Timer which
shares the same 8-bit programmable prescaler with the
RTCC. The prescaler actually serves as a postscaler if
used in conjunction with the WDT, in contrast to its use as
a prescaler with the RTCC.
10.3
The Prescaler
The 8-bit prescaler may be assigned to either the RTCC
or the WDT through the PSA bit (bit 3 of the OPTION reg-
ister). Setting the PSA bit assigns the prescaler to the
WDT. If assigned to the WDT, the WDT clocks the pres-
caler and the prescaler divide rate is selected by the
PS0, PS1, and PS2 bits located in the OPTION register.
Clearing the PSA bit assigns the prescaler to the RTCC.
Once assigned to the RTCC, the prescaler clocks the
RTCC and the divide rate is selected by the PS0, PS1,
and PS2 bits in the OPTION register. The prescaler is not
mapped into the data memory, so run-time access is not
possible.
The prescaler cannot be assigned to both the RTCC and
WDT simultaneously.
Watchdog Timer
Figure 10-1. RTCC and WDT Block Diagram
WDTE (from FUSE Word)
RTCC pin
MUX
8-Bit Prescaler
MUX (8 to 1)
8-Bits
WDT Time-out
Data Bus
WDT
MUX
M
U
X
RTCC
M
U
X
F
OSC
RST
RTE_ES
PSA
PS2
PS1
PS0
OPTION
Register
RTCC Rollover
Interrupt
RTE_IE
RTW
RTCC
Interrupt
Enable
相關PDF資料 |
PDF描述 |
|---|---|
| SX20AC75 | Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
| SX28 | Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
| SX28AC | Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
| SX18AC75 | Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
| SX48BD | Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability, and On-Chip Debug |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SX20AC/SS | 功能描述:8位微控制器 -MCU 75MHz 2048x12 Flash 136 RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| SX20AC/SS-G | 功能描述:8位微控制器 -MCU RISC 75MHz 8bit timer RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| SX20AC100-I/DP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
| SX20AC100-I/PQ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
| SX20AC100-I/SO | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Configurable Communications Controllers with EE/Flash Program Memory, In-System Programming Capability and On-Chip Debug |
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