S912XET512J3VALR Freescale Semiconductor, S912XET512J3VALR Datasheet - Page 700

• Manufacturer Part Number: S912XET512J3VALR
• Description: 16-bit Microcontrollers - MCU 16 BIT,512K FLASH
• Manufacturer: Freescale Semiconductor

Specifications of S912XET512J3VALR

• Rohs: yes
• Core: HCS12X
• Processor Series: MC9S12XE
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 512 KB
• Data Ram Size: 32 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3.13 V to 5.5 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-112
• Mounting Style: SMD/SMT

Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
Read: Anytime
Write: Anytime
700
Module Base + 0x0003
PCKB[2:0]
PCKA[2:0]
s
Reset
Field
6–4
2–0
W
R
Prescaler Select for Clock B — Clock B is one of two clock sources which can be used for channels 2, 3, 6, or
7. These three bits determine the rate of clock B, as shown in
Prescaler Select for Clock A — Clock A is one of two clock sources which can be used for channels 0, 1, 4 or
5. These three bits determine the rate of clock A, as shown in
0
0
7
PCKB2–0 and PCKA2–0 register bits can be written anytime. If the clock
pre-scale is changed while a PWM signal is being generated, a truncated or
stretched pulse can occur during the transition.
= Unimplemented or Reserved
Figure 19-6. PWM Prescale Clock Select Register (PWMPRCLK)
PCKB2
PCKB2
PCKA2
0
6
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 19-5. PWMPRCLK Field Descriptions
MC9S12XE-Family Reference Manual Rev. 1.25
Table 19-6. Clock B Prescaler Selects
Table 19-7. Clock A Prescaler Selects
PCKB1
PCKB1
0
PCKA1
5
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
PCKB0
NOTE
PCKB0
0
4
PCKA0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Description
0
0
3
Value of Clock B
Value of Clock A
Table
Table
Bus clock / 128
Bus clock / 128
Bus clock / 16
Bus clock / 32
Bus clock / 16
Bus clock / 32
Bus clock / 64
Bus clock / 64
Bus clock / 2
Bus clock / 4
Bus clock / 8
Bus clock / 2
Bus clock / 4
Bus clock / 8
Bus clock
Bus clock
19-6.
19-7.
PCKA2
0
2
PCKA1
Freescale Semiconductor
0
1
PCKA0
0
0