C501G-1E SIEMENS [Siemens Semiconductor Group], C501G-1E Datasheet - Page 95

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

9.2
The setup for microcontroller quick-pulse programming is shown in figure 9-28. Note that the
C501-1E is running with a 4 to 6 MHz oscillator The reason the oscillator needs to be running is that
the device is executing internal address and program data transfers.
Figure 9-28
C501-1E OTP Memory Programming Configuration
The address of the OTP memory location to be programmed is applied to port 1 and 2. The code
byte to be programmed into that location is applied to port 0. RESET, PSEN and pins of port 2 and
3 specified in table 9-11 are held at the “Program code data“ levels. The ALE/PROG signal is
pulsed low 25 times as shown in figure 9-29.
Figure 9-29
C501-1E ALE/PROG Waveform
Semiconductor Group
ALE/PROG
ALE/PROG
Quick-Pulse Programming
4 - 6 MHz
A0 - A7
1
1
1
0
1
V
Port 1
RESET
P3.6
P3.7
XTAL2
XTAL1
SS
10 s min.
C501-1E
9-2
25 Pulses
ALE/PROG
P2.0 - P2.4
EA/
MCS03232
Port 0
PSEN
P2.7
P2.6
V
V
CC
PP
OTP Memory Operation
+5 V
Programming
Data
+12.75 V
25 x 100 s
Low Pulses
0
1
0
A8 - A12
MCT03234
C501