参数资料
型号: COP8CBR9LVA8
厂商: National Semiconductor
文件页数: 32/111页
文件大小: 0K
描述: IC MCU EEPROM 8BIT 32K 68PLCC
标准包装: 18
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: 59
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: 68-LCC(J 形引线)
包装: 管件
其它名称: *COP8CBR9LVA8
SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
SP (Stack Pointer):
Initialized to RAM address 06F Hex
B and X Pointers:
UNAFFECTED after RESET with power already applied
RANDOM after RESET at power-on
S Register: CLEARED
RAM:
UNAFFECTED after RESET with power already applied
RANDOM after RESET at power-on
USART:
PSR, ENU, ENUR, ENUI: Cleared except the TBMT bit
which is set to one.
ANALOG TO DIGITAL CONVERTER:
ENAD: CLEARED
ADRSTH: RANDOM
ADRSTL: RANDOM
ISP CONTROL:
ISPADLO: CLEARED
ISPADHI: CLEARED
PGMTIM: PRESET TO VALUE FOR 10 MHz CKI
WATCHDOG (if enabled):
The device comes out of reset with both the WATCHDOG logic and the Clock Monitor
detector armed, with the WATCHDOG service window bits set and the Clock Monitor bit set.
The WATCHDOG and Clock Monitor circuits are inhibited during reset. The WATCHDOG
service window bits being initialized high default to the maximum WATCHDOG service
window of 64k T0 clock cycles. The Clock Monitor bit being initialized high will cause a Clock
Monitor error following reset if the clock has not reached the minimum specified frequency at
the termination of reset. A Clock Monitor error will cause an active low error output on pin
G1. This error output will continue until 16–32 T0 clock cycles following the clock frequency
reaching the minimum specified value, at which time the G1 output will go high.
5.7.1
External Reset
The RESET input when pulled low initializes the device. The RESET pin must be held low for a minimum
of one instruction cycle to ensure a valid reset. During Power-Up initialization, the user must ensure that
the RESET pin of a device without the Brownout Reset feature is held low until the device is within the
specified VCC voltage. Any rising edge on the RESET pin while VCC is below the specified operating range
may cause unpredictable results. An R/C circuit on the RESET pin with a delay 5 times (5x) greater than
the power supply rise time is recommended. Reset should also be wide enough to ensure crystal start-up
upon Power-Up.
RESET may also be used to cause an exit from the HALT mode.
A recommended reset circuit for this device is shown in Figure 5-3.
Copyright 2000–2013, Texas Instruments Incorporated
Functional Description
27
Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9
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