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COP8AME9EMW8 参数 Datasheet PDF下载

COP8AME9EMW8图片预览
型号: COP8AME9EMW8
PDF下载: 下载PDF文件 查看货源
内容描述: 8位CMOS闪存微控制器,具有8K内存,双通道运算放大器,虚拟EEROM ,温度传感器, 10位A / D和掉电复位 [8-Bit CMOS Flash Microcontroller with 8k Memory, Dual Op Amps, Virtual EEROM, Temperature Sensor,10-Bit A/D and Brownout Reset]
分类和应用: 闪存传感器温度传感器微控制器和处理器外围集成电路运算放大器光电二极管时钟
文件页数/大小: 83 页 / 908 K
品牌: NSC [ National Semiconductor ]
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10.7 RESET  
10.0 Functional Description  
The device is initialized when the RESET pin is pulled low or  
the On-chip Brownout Reset is activated.  
(Continued)  
;options  
.endsect  
Example: The following sets a value in the Option Register  
for a COP8AME9. The Option Register bit values shown  
select options: Security disabled, WATCHDOG enabled  
HALT mode enabled and execution will commence from  
Flash Memory.  
20006311  
.chip  
.sect  
.db  
8AME  
option, conf  
0x01  
FIGURE 7. Reset Logic  
;wd, halt, flex  
.endsect  
...  
The following occurs upon initialization:  
Port B: TRI-STATE (High Impedance Input)  
.end  
start  
Port G: TRI-STATE (High Impedance Input). Exceptions: If  
Watchdog is enabled, then G1 is Watchdog output. G0 and  
G2 have their weak pull-up enabled during RESET.  
Note: All programmers certified for programming this family  
of parts will support programming of the Option Register.  
Please contact National or your device programmer supplier  
for more information.  
Port L: TRI-STATE (High Impedance Input)  
PC: CLEARED to 0000  
10.6 SECURITY  
PSW, CNTRL and ICNTRL registers: CLEARED  
SIOR:  
The device has a security feature which, when enabled,  
prevents external reading of the Flash program memory. The  
security bit in the Option Register determines, whether se-  
curity is enabled or disabled. If the security feature is dis-  
abled, the contents of the internal Flash Memory may be  
read by external programmers or by the built in  
MICROWIRE/PLUS serial interface ISP. Security must be  
enforced by the user when the contents of the Flash  
Memory are accessed via the user ISP or Virtual EE-  
PROM capability.  
UNAFFECTED after RESET with power already applied  
RANDOM after RESET at power-on  
T2CNTRL: CLEARED  
T3CNTRL: CLEARED  
HSTCR: CLEARED  
ITMR: Cleared except Bit 6 (HSON) = 1  
Accumulator, Timer 1, Timer 2 and Timer 3:  
RANDOM after RESET  
If the security feature is enabled, then any attempt to exter-  
nally read the contents of the Flash Memory will result in the  
value FF (hex) being read from all program locations (except  
the Option Register). In addition, with the security feature  
enabled, the write operation to the Flash program memory  
and Option Register is inhibited. Page Erases are also inhib-  
ited when the security feature is enabled. The Option Reg-  
ister is readable regardless of the state of the security bit by  
accessing location FFFF (hex). Mass Erase Operations are  
possible regardless of the state of the security bit.  
WKEN, WKEDG: CLEARED  
WKPND: RANDOM  
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  
The security bit can be erased only by a Mass Erase of the  
entire contents of the Flash unless Flash operation is under  
the control of User ISP functions.  
RAM:  
UNAFFECTED after RESET with power already applied  
RANDOM after RESET at power-on  
USART:  
Note: The actual memory address of the Option Register is  
1FFF (hex), however the MICROWIRE/PLUS ISP routines  
require the address FFFF (hex) to be used to read the  
Option Register when the Flash Memory is secured.  
PSR, ENU, ENUR, ENUI: Cleared, except the TBMT bit  
which is set to one.  
The entire Option Register must be programmed at one time  
and cannot be rewritten without first erasing the entire last  
page of Flash Memory.  
ANALOG TO DIGITAL CONVERTER:  
ENAD: CLEARED  
ADRSTH: RANDOM  
ADRSTL: RANDOM  
Op Amp:  
AMPTRMN, AMPTRMP: Cleared, except bit 6 = 1  
ADGAIN: CLEARED  
ISP CONTROL:  
ISPADLO: CLEARED  
ISPADHI: CLEARED  
PGMTIM: PRESET TO VALUE FOR 10 MHz CKI  
19  
www.national.com  
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