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| 型号： | COP8CCR9KMT8 |
| 厂商： | National Semiconductor |
| 文件页数： | 92/111页 |
| 文件大小： | 0K |
| 描述： | IC MCU EEPROM 8BIT 32K 56-TSSOP |
| 标准包装： | 34 |
| 系列： | COP8™ 8C |
| 核心处理器： | COP8 |
| 芯体尺寸： | 8-位 |
| 速度： | 20MHz |
| 连通性： | Microwire/Plus（SPI），UART/USART |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 49 |
| 程序存储器容量： | 32KB（32K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 1K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 数据转换器： | A/D 16x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 56-TFSOP（0.240"，6.10mm 宽） |
| 包装： | 管件 |
| 其它名称： | *COP8CCR9KMT8 |
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SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
should return to execute the VIS instruction. This is particularly useful when exiting long interrupt
service routines if the time between interrupts is short. In this case the RETI instruction would only be
executed when the default VIS routine is reached.
3. While executing from the Boot ROM for ISP or virtual E2 operations, the hardware will disable
interrupts from occurring. The hardware will leave the GIE bit in its current state, and if set, the
hardware interrupts will occur when execution is returned to Flash Memory. Subsequent interrupts,
during ISP operation, from the same interrupt source will be lost.
5.16 WATCHDOG/Clock Monitor
The devices contain a user selectable WATCHDOG and clock monitor. The following section is applicable
only if the WATCHDOG feature has been selected in the Option register. The WATCHDOG is designed to
detect the user program getting stuck in infinite loops resulting in loss of program control or “runaway”
programs.
The WATCHDOG logic contains two separate service windows. While the user programmable upper
window selects the WATCHDOG service time, the lower window provides protection against an infinite
program loop that contains the WATCHDOG service instruction. The WATCHDOG uses the Idle Timer
(T0) and thus all times are measured in Idle Timer Clocks.
The Clock Monitor is used to detect the absence of a clock or a very slow clock below a specified rate on
tC.
The WATCHDOG consists of two independent logic blocks: WD UPPER and WD LOWER. WD UPPER
establishes the upper limit on the service window and WD LOWER defines the lower limit of the service
window.
Servicing the WATCHDOG consists of writing a specific value to a WATCHDOG Service Register named
WDSVR which is memory mapped in the RAM. This value is composed of three fields, consisting of a 2-
bit Window Select, a 5-bit Key Data field, and the 1-bit Clock Monitor Select field. Table 5-26 shows the
WDSVR register.
Table 5-26. WATCHDOG Service Register (WDSVR)
Window Select
Key Data
Clock Monitor
X
0
1
0
Y
7
6
5
4
3
2
1
0
The lower limit of the service window is fixed at 2048 Idle Timer Clocks. Bits 7 and 6 of the WDSVR
register allow the user to pick an upper limit of the service window.
Table 5-27 shows the four possible combinations of lower and upper limits for the WATCHDOG service
window. This flexibility in choosing the WATCHDOG service window prevents any undue burden on the
user software.
Bits 5, 4, 3, 2 and 1 of the WDSVR register represent the 5-bit Key Data field. The key data is fixed at
01100. Bit 0 of the WDSVR Register is the Clock Monitor Select bit.
Table 5-27. WATCHDOG Service Window Select
Clock
Service Window
WDSVR
Monitor
for High Speed Mode
for Dual Clock & Low Speed Modes
Bit 7
Bit 6
Bit 0
(Lower-Upper Limits)
0
X
2048-8k tC Cycles
2048-8k Cycles of 32 kHz Clk
0
1
X
2048-16k tC Cycles
2048-16k Cycles of LS 32 kHz Clk
1
0
X
2048-32k tC Cycles
2048-32k Cycles of LS 32 kHz Clk
1
X
2048-64k tC Cycles
2048-64k Cycles of LS 32 kHz Clk
X
0
Clock Monitor Disabled
Copyright 2000–2013, Texas Instruments Incorporated
Functional Description
81
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相关代理商/技术参数 |
参数描述 |
|---|---|
| COP8CCR9LVA7 | 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| COP8CCR9LVA7/63 | 制造商:Texas Instruments 功能描述: |
| COP8CCR9LVA7/63SN | 功能描述:闪存 RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| COP8CCR9LVA7/NOPB | 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| COP8CCR9LVA763SN | 制造商:National Semiconductor 功能描述:MCU 8-bit COP8 CISC 32KB Flash 5V 68-Pin PLCC |
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