SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 387

• Manufacturer Part Number: SAF-C161U-LF V1.3
• Description: IC MCU ISDN 16BIT TTL TQFP-100
• Manufacturer: Infineon Technologies
• Series: C16xxr

Specifications of SAF-C161U-LF V1.3

• Core Processor: C166
• Core Size: 16-Bit
• Speed: 36MHz
• Connectivity: EBI/EMI, SPI, UART/USART, USB
• Peripherals: POR, PWM, WDT
• Number Of I /o: 56
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: SAFC161ULFV1.3X; SAFC161ULFV13XP; SP000007502

Figure 118
Write Access in Low Protected Mode
The write access in low protected mode is also done via a command sequence. First the
specific command 4 (see figure above) with the current password has to be written to
register SCUSLC. After this command all security registers are unlocked until the next
write access to any CSCU register is done. Read access is always possible to all
registers of the CSCU and will not influence the command sequences. In register
SCUSCS the actual status of the command state machine can always be read.
It is recommendet to use an atomic sequence for all command sequences.
Data Sheet
Note :
Reset
1)
and the new password is valid.
Only if the security level command register is accessed, the new security level
State 4
Command4
and low
protected
mode
Statemachine for Security Level Switching
write access
register
any CSCU
Command
Number
0
1
2
3
4
Command
AAAA
5554
96
000
8E
security register in low protected mode
State 0
State 1
h
h
b
+ inverse (old) password
+ inverse (new) password: Unlock
h
+ new level + 000
h
Command1
or any other CSCU
register write access
387
Command1
register write access
or any other CSCU
Command3
Command2
b
or any other CSCU
+ new password
System Control Unit (CSCU)
register write
access
1)
State 3
State 2
2001-04-19
C161U