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| 型號(hào)： | SAB-C541U-1EP |
| 廠商： | SIEMENS A G |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP52 |
| 文件頁(yè)數(shù)： | 38/65頁(yè) |
| 文件大?。?/td> | 427K |
| 代理商： | SAB-C541U-1EP |
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Semiconductor Group
38
1997-10-01
C540U
C541U
OTP Memory Operation
The C540U/C541U contains a 8k byte one-time programmable (OTP) program memory (C540U :
4k byte). With the C540U/C541U fast programming cycles are achieved (1 byte in 100
μ
sec). Also
several levels of OTP memory protection can be selected.
For programming of the device, the C540U/C541U must be put into the programming mode. This
typically is done not in-system but in a special programming hardware. In the programming mode
the C540U/C541U operates as a slave device similar as an EPROM standalone memory device
and must be controlled with address/data information, control lines, and an external 11.5V
programming voltage.
Figure 20
shows the pins of the C504-2E which are required for controlling
of the OTP programming mode.
Figure 20
Programming Mode Configuration
PMSEL1
PMSEL0
XTAL2
XTAL1
D0 - D7
V
SS
V
CC
C541U
MCS03386
A8 - A12
PALE
EA /
PROG
PRD
RESET
PSEN
PSEL
V
PP
Port 2
Port 0
C540U
A0 - A7 /
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