參數(shù)資料
型號(hào): AT89S52-24JI
廠商: Atmel
文件頁數(shù): 16/37頁
文件大?。?/td> 0K
描述: IC MCU 8K FLASH 24MHZ 44-PLCC
標(biāo)準(zhǔn)包裝: 27
系列: 89S
核心處理器: 8051
芯體尺寸: 8-位
速度: 24MHz
連通性: UART/USART
外圍設(shè)備: WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
23
1919D–MICRO–6/08
AT89S52
22. Programming Interface – Parallel Mode
Every code byte in the Flash array can be programmed by using the appropriate combination of
control signals. The write operation cycle is self-timed and once initiated, will automatically time
itself to completion.
Most major worldwide programming vendors offer support for the Atmel AT89 microcontroller
series. Please contact your local programming vendor for the appropriate software revision.
Notes:
1. Each PROG pulse is 200 ns - 500 ns for Chip Erase.
2. Each PROG pulse is 200 ns - 500 ns for Write Code Data.
3. Each PROG pulse is 200 ns - 500 ns for Write Lock Bits.
4. RDY/BSY signal is output on P3.0 during programming.
5. X = don’t care.
Table 22-1.
Flash Programming Modes
Mode
V
CC
RST
PSEN
ALE/
PROG
EA/
V
PP
P2.6
P2.7
P3.3
P3.6
P3.7
P0.7-0
Data
P2.4-0
P1.7-0
Address
Write Code Data
5V
H
L
12V
L
HHHH
D
IN
A12-8
A7-0
Read Code Data
5V
H
L
H
L
H
D
OUT
A12-8
A7-0
Write Lock Bit 1
5V
H
L
12V
HHHHH
X
Write Lock Bit 2
5V
H
L
12V
H
L
X
Write Lock Bit 3
5V
H
L
12V
H
L
H
L
X
Read Lock Bits
1, 2, 3
5V
H
L
H
L
H
L
P0.2,
P0.3,
P0.4
XX
Chip Erase
5V
H
L
12V
HLHL
L
X
Read Atmel ID
5V
H
L
H
LLLLL
1EH
X 0000
00H
Read Device ID
5V
H
L
H
LLLLL
52H
X 0001
00H
Read Device ID
5V
H
L
H
LLLLL
06H
X 0010
00H
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