參數(shù)資料
型號: COP8CDR9KMT8
廠商: National Semiconductor
文件頁數(shù): 30/111頁
文件大?。?/td> 0K
描述: IC MCU EEPROM 8BIT 32K 56-TSSOP
標(biāo)準(zhǔn)包裝: 34
系列: COP8™ 8C
核心處理器: COP8
芯體尺寸: 8-位
速度: 20MHz
連通性: Microwire/Plus(SPI),UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 49
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 16x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 56-TFSOP(0.240",6.10mm 寬)
包裝: 管件
其它名稱: *COP8CDR9KMT8
SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
Bit 2
= 1
WATCHDOG feature disabled. G1 is a general purpose I/O.
= 0
WATCHDOG feature enabled. G1 pin is WATCHDOG output with weak pullup.
Bit 1
= 1
HALT mode disabled.
= 0
HALT mode enabled.
Bit 0
= 1
Execution following RESET will be from Flash Memory.
= 0
Flash Memory is erased. Execution following RESET will be from Boot ROM with the
MICROWIRE/PLUS ISP routines.
The COP8 assembler defines a special ROM section type, CONF, into which the Option Register data
may be coded. The Option Register is programmed automatically by programmers that are certified by TI.
The user needs to ensure that the FLEX bit will be set when the device is programmed.
The following examples illustrate the declaration of the Option Register.
Syntax:
[label:].sect
config, conf
.db
value
;1 byte,
;configures
;options
.endsect
Example: The following sets a value in the Option Register and User Identification for a COP8CBR9HVA7.
The Option Register bit values shown select options: Security disabled, WATCHDOG enabled HALT
mode enabled and execution will commence from Flash Memory.
.chip
8CBR
.sect
option, conf
.db
0x01
;wd, halt, flex
.endsect
...
.end
start
Note: All programmers certified for programming this family of parts will support programming of the
Option Register. Please contact TI or your device programmer supplier for more information.
5.6
SECURITY
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 security is enabled or disabled. If the
security feature is disabled, 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 EEPROM
capability.
If the security feature is enabled, then any attempt to externally 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 inhibited when the security feature is enabled. The Option Register 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.
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.
Copyright 2000–2013, Texas Instruments Incorporated
Functional Description
25
Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9
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