SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 53
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SAF-C164SM
Manufacturer Part Number
SAF-C164SM
Description
16-Bit CMOS Microcontroller
Manufacturer
Infineon Technologies
Datasheet
1.SAF-C164SM.pdf
(470 pages)
- Current page: 53 of 470
- Download datasheet (6Mb)
External Host Mode Programming
In this mode the signals to control a programming cycle are generated by an external
host using the C164CM’s bus interface. The external host provides the data to be
programmed. The C164CM itself is switched off and its OTP module can be accessed
like standalone memory.
In External Host Mode the following port pins represent the interface to the C164CM’s
OTP module:
Table 3-4
Signal
ADDR
DATA
RD
WR
CE
RSEL
RSTOUT
V
1)
The access cycles generated by the external host must fulfill the timing requirements
shown in the timing diagrams above.
Note: EHM is a variety of the emulation mode where pin P0.15 (P0L.7) is inverted during
User’s Manual
PP
The specific behavior of the C164CM in emulation mode (prerequisite for EHM) is described in
the reset configuration. This influences the selected clock generation mode.
For EHM operation direct drive or prescaler mode must be configured. If the
on-chip oscillator is not supplied with a clock signal the oscillator watchdog must
not be disabled, so the PLL can provide the clock signal instead.
Pin
P1H.7 - P1L.1
P0H.7 - P0L.0
P20.0/RD
P20.1/WR
P5.6
P5.7
RSTOUT
P20.5/EA/
External Host Mode Interface Signals
V
PP
Description
Physical OTP word address (address line A0 is not
evaluated)
Word to be programmed or verified
Verify cycle control
Programming cycle control
OTP enable signal
Control signal RSEL used for protection lock control,
must be ‘0’ for OTP programming cycles
Must be held high (pullup resistor)
External programming voltage
3-15
1)
Memory Organization
C164CM/C164SM
Derivatives
V1.0, 2002-02
Section
20.4.1.
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