參數(shù)資料
型號: Q67126-C2001
廠商: SIEMENS AG
元件分類: 8位微控制器
英文描述: 8-Bit CMOS Microcontroller
中文描述: 8位CMOS微控制器
文件頁數(shù): 38/65頁
文件大小: 427K
代理商: Q67126-C2001
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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