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C508 Datasheet(PDF) 66 Page - Infineon Technologies AG

Part # C508
Description  8-Bit CMOS Microcontroller
PDF  93 Pages
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

C508 Datasheet(HTML) 66 Page - Infineon Technologies AG

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C508
Data Sheet
62
2000-08
Programming Mode Selection
The selection for the OTP programming mode can be separated into two different parts:
– Basic programming mode selection
– Access mode selection
With basic programming mode selection, the device is put into the mode in which it is
possible to access the OTP memory through the programming interface logic. Further,
after selection of the basic programming mode, OTP memory accesses are executed by
using one of the access modes. These access modes are OTP memory byte program/
read, version byte read, and program/read lock byte operations.
Basic Programming Mode Selection
The basic programming mode selection scheme is shown in Figure 31.
Figure 31
Basic Programming Mode Selection
MCD04093
V
DD
5 V
Clock
(XTAL1/
XTAL2)
RESET
"1"
PSEN
"0"
PMSEL1,0
PROG
PRD
"1"
"0"
0,1
PSEL
PALE
"0"
EA/
V
PP
V
PP
V
IH2
0 V
Ready for access
mode selection
During this period signals
are not actively driven
Stable



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