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參數資料
型號: MC68HC705BD3
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁數: 103/112頁
文件大小: 676K
代理商: MC68HC705BD3
MC68HC05BD3
MOTOROLA
14-3
MC68HC705BD3
14
14.3.1
Programming Control Register (PCR)
The EPROM Programming Control register controls the actual programming of the EPROM in the
MC68HC705BD3.
ELAT - EPROM Latch Control
1 (set)
EPROM address and data bus configured for programming (writes to
EPROM cause address data to be latched). EPROM is in
programming mode and cannot be read if ELAT is 1. This bit is not
able be set when no V
PP
voltage is applied to the V
PP
pin.
0 (clear) –
EPROM address and data bus configured for normal reads.
PGM - EPROM Program Command
1 (set)
Programming power switched on to EPROM array. If ELAT
1 then
PGM=0.
0 (clear) –
Programming power switched off to EPROM array.
14.3.2
EPROM Programming Sequence
Programming the EPROM of the MC68HC705BD3 is as follows:
1) Set the ELAT bit.
2) Write the data to be programmed to the address to be programmed.
3) Set the PGM bit.
4) Delay for the appropriate amount of time.
5) Clear the PGM and the ELAT bits.
The last action may be carried out in a single CPU write operation. It is important to remember
that an external programming voltage must be applied to the V
PP
pin while programming, but
should be equal to V
DD
during normal operation.
Example shows address $2000 is programmed with $00.
CLR
LDX
BSET
LDA
STA
PCR
#$00
1,PCR
#$00
$2000,X
;reset PCR
;load index register with 00
;set ELAT bit
;load data=00 in to A
;latch data and address
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$001D
ELAT
PGM
---- --00
TPG
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相關代理商/技術參數
參數描述
MC68HC705BD3P 制造商:Motorola 功能描述:MOTOROLA NXC4C
MC68HC705BD7P1 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HC705C4ACP 制造商:Freescale Semiconductor 功能描述:
MC68HC705C8AB 功能描述:IC MCU 8K OTP 2.1MHZ 42-SDIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN,SCI,SPI 外圍設備:POR,PWM,溫度傳感器,WDT 輸入/輸出數:21 程序存儲器容量:40KB(20K x 16) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數據轉換器:A/D 6x12b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
MC68HC705C8ACB 制造商:Rochester Electronics LLC 功能描述:HCO5 CORE + 8K RAM + EPR - Bulk
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