參數(shù)資料
型號: Q67121C2168A1
英文描述: IC-SM-16 BIT CPU
中文描述: 集成電路的Sm - 16位CPU
文件頁數(shù): 94/121頁
文件大小: 1000K
代理商: Q67121C2168A1
Semiconductor Group
9-1
OTP Memory Operation
C501
9
OTP Memory Operation of the C501-1E
The C501-1E is the OTP version of the C501-1R ROM version microcontroller. Its functionality is
fully compatible with the C501-1R functionality. This chapter describes in detail the programming
features of the C501-1E.
9.1
The C501-1E is programmed by usng a modified Quick-Pulse Programming
TM 1)
algorithm. It differs
from older methods in the value used for V
PP
(programming supply voltage) and in the width and
number of the ALE/PROG pulses. The C501-1E contains two signature bytes that can be read and
used by a programming system to identify the device. The signature bytes identify the manufacturer
and the type of the device.
Programming Modes
Table 9-11
shows the logic levels for reading the signature byte, and for programming the program
memory, the encryption table, and the security bits.
Notes :
1.
“0” = valid low for that pin, “1” = valid high for that pin.
2. V
PP
= 12.75 V
±
0.25V
3. V
CC
= 5 V
±
10% during programming and verification.
4. ALE/PROG receives 25 programming pulses while V
PP
is held at 12.75 V. Each programming pulse is low for
100
μ
s (
±
10
μ
s) and high for a minimum of 10
μ
s.
1
Quick-Pulse Programming
TM
is a trademark phrase of Intel Corporation
Table 9-11
OTP Programming Modes
Mode
RESET
PSEN
ALE/
PROG
EA/V
PP
P2.7
P2.6
P3.7
P3.6
Read signature
1
0
1
1
0
0
0
0
Program code data
1
0
0
V
PP
1
1
0
1
1
Verify code data
1
0
1
0
0
1
1
Progam encryption table
1
0
0
V
PP
V
PP
V
PP
1
0
1
0
Program security bit 1
1
0
0
1
1
1
1
Program security bit 2
1
0
0
1
1
0
0
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