参数资料
型号: COP8CBR9LVA8
厂商: National Semiconductor
文件页数: 37/111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
Table 5-2. Startup Times
CKI Frequency
Startup Time
10 MHz
1–10 ms
3.33 MHz
3–10 ms
1 MHz
3–20 ms
455 kHz
10–30 ms
32 kHz (low speed oscillator)
2–5 sec
5.8.2
Clock Doubler
This device contains a frequency doubler that doubles the frequency of the oscillator selected to operate
the main microcontroller core. The details of how to select either the high speed oscillator or low speed
oscillator are described in, Power Saving Features. When the high speed oscillator connected to CKI
operates at 10 MHz, the internal clock frequency is 20 MHz, resulting in an instruction cycle time of 0.5 s.
When the 32 kHz oscillator connected to L0 and L1 is selected, the internal clock frequency is 64 kHz,
resulting in an instruction cycle of 152.6 s. The output of the clock doubler is called MCLK and is
referenced in many places within this document.
5.9
CONTROL REGISTERS
5.9.1
CNTRL Register (Address X
00EE)
T1C3
T1C2
T1C1
T1C0
MSEL
IEDG
SL1
SL0
Bit 7
Bit 0
The Timer1 (T1) and MICROWIRE/PLUS control register contains the following bits:
T1C3
Timer T1 mode control bit
T1C2
Timer T1 mode control bit
T1C1
Timer T1 mode control bit
T1C0
Timer T1 Start/Stop control in timer modes 1 and 2. T1 Underflow Interrupt Pending Flag in
timer mode 3
MSEL
Selects G5 and G4 as MICROWIRE/PLUS signals SK and SO respectively
IEDG
External interrupt edge polarity select (0 = Rising edge, 1 = Falling edge)
SL1 & SL0 Select the MICROWIRE/PLUS clock divide by (00 = 2, 01 = 4, 1x = 8)
5.9.2
PSW Register (Address X
00EF)
HC
C
T1PNDA
T1ENA
EXPND
BUSY
EXEN
GIE
Bit 7
Bit 0
The PSW register contains the following select bits:
HC
Half Carry Flag
C
Carry Flag
T1PNDA
Timer T1 Interrupt Pending Flag (Autoreload RA in mode 1, T1 Underflow in Mode 2, T1A
capture edge in mode 3)
T1ENA
Timer T1 Interrupt Enable for Timer Underflow or T1A Input capture edge
EXPND
External interrupt pending
Copyright 2000–2013, Texas Instruments Incorporated
Functional Description
31
Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9
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