參數(shù)資料
型號(hào): AT87C54X2-SLSUM
廠商: Atmel
文件頁數(shù): 32/62頁
文件大?。?/td> 0K
描述: IC 8051 MCU 16K EPROM 44PLCC
標(biāo)準(zhǔn)包裝: 972
系列: 87C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40/20MHz
連通性: UART/USART
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 16KB(16K x 8)
程序存儲(chǔ)器類型: OTP
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 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
38
4431E–8051–04/06
AT/TS8xC54/8X2
17.2.3
Signature bytes
The TS87C54/58X2 contains 4 factory programmed signatures bytes. To read these bytes, per-
form the process described in section 8.3.
17.3
EPROM Programming
17.3.1
Set-up modes
In order to program and verify the EPROM or to read the signature bytes, the TS87C54/58X2 is
placed in specific set-up modes (See Figure 17-1.).
Control and program signals must be held at the levels indicated in Table 17-2.
17.3.2
Definition of terms
Address Lines:P1.0-P1.7,
P2.0-P2.5,
P3.4
respectively
for
A0-A14
(P2.5
(A13)
for
TS87C54X2, P3.4 (A14) for TS87C58X2).
Data Lines:P0.0-P0.7 for D0-D7
Control Signals:RST, PSEN, P2.6, P2.7, P3.3, P3.6, P3.7.
Program Signals:ALE/PROG, EA/VPP.
Table 17-2.
EPROM Set-Up Modes
Mode
RST
PSEN
ALE/PR
OG
EA/VPP
P2.6
P2.7
P3.3
P3.6
P3.7
Program Code data
1
0
12.75V
01111
Verify Code data
1
0
110
011
Program Encryption
Array Address 0-3Fh
1
0
12.75V
0
1
0
1
Read Signature Bytes
1
0
1
0
Program Lock bit 1
1
0
12.75V
1
Program Lock bit 2
1
0
12.75V
1
0
Program Lock bit 3
1
0
12.75V
1
0
1
0
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