C501G-1E SIEMENS [Siemens Semiconductor Group], C501G-1E Datasheet - Page 94

• Manufacturer Part Number: C501G-1E
• Description: 8-Bit Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

9
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
from older methods in the value used for V
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.
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.
Table 9-11
OTP Programming Modes
Mode
Read signature
Program code data
Verify code data
Progam encryption table
Program security bit 1
Program security bit 2
Notes :
1. “0” = valid low for that pin, “1” = valid high for that pin.
2. V
3. V
4. ALE/PROG receives 25 programming pulses while V
1
Semiconductor Group
100 s ( 10 s) and high for a minimum of 10 s.
Quick-Pulse Programming
PP
CC
OTP Memory Operation of the C501-1E
Programming Modes
= 12.75 V
= 5 V
10% during programming and verification.
0.25V
TM
RESET
is a trademark phrase of Intel Corporation
1
1
1
1
1
1
PSEN
0
0
0
0
0
0
PP
PROG
(programming supply voltage) and in the width and
ALE/
9-1
1
0
1
0
0
0
PP
is held at 12.75 V. Each programming pulse is low for
EA/V
V
V
V
V
1
1
PP
PP
PP
PP
PP
P2.7
OTP Memory Operation
0
1
0
1
1
1
P2.6
TM 1)
0
0
0
0
1
1
algorithm. It differs
P3.7
0
1
1
1
1
0
P3.6
C501
0
1
1
0
1
0