S9S12GN16F0CFT Freescale Semiconductor, S9S12GN16F0CFT Datasheet - Page 401

• Manufacturer Part Number: S9S12GN16F0CFT
• Description: 16-bit Microcontrollers - MCU 16-bit16k Flash 2k RAM
• Manufacturer: Freescale Semiconductor

Specifications of S9S12GN16F0CFT

• Rohs: yes
• Core: S12
• Processor Series: MC9S12G
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 16 KB
• Data Ram Size: 1024 B
• On-chip Adc: Yes
• Operating Supply Voltage: 3.13 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: TSSOP-20
• Mounting Style: SMD/SMT

10.3.2.20 S12CPMU Protection Register (CPMUPROT)
This register protects the following clock configuration registers from accidental overwrite:
CPMUSYNR, CPMUREFDIV, CPMUCLKS, CPMUPLL, CPMUIRCTRIMH/L and CPMUOSC
Read: Anytime
Write: Anytime
Freescale Semiconductor
0x02FB
Reset
PROT
Field
0
W
R
Clock Configuration Registers Protection Bit — This bit protects the clock configuration registers from
accidental overwrite (see list of affected registers above):
Writing 0x26 to the CPMUPROT register clears the PROT bit, other write accesses set the PROT bit.
0 Protection of clock configuration registers is disabled.
1 Protection of clock configuration registers is enabled. (see list of protected registers above).
0
0
7
Figure 10-28. S12CPMU Protection Register (CPMUPROT)
0
0
6
MC9S12G Family Reference Manual, Rev.1.23
0
0
5
0
0
4
Description
S12 Clock, Reset and Power Management Unit (S12CPMU)
0
0
3
0
0
2
0
0
1
PROT
0
0
403