LFEBS12UB Freescale Semiconductor, LFEBS12UB Datasheet - Page 702

• Manufacturer Part Number: LFEBS12UB
• Description: KIT STUDENT LEARNING S12 DG128
• Manufacturer: Freescale Semiconductor

Specifications of LFEBS12UB

• Architecture: 8/16-bit
• Code Gen Tools Included: Code Warrior
• Silicon Manufacturer: Freescale
• Core Architecture: S12
• Core Sub-architecture: S12
• Silicon Core Number: MC9S12
• Silicon Family Name: S12D
• Kit Contents: HCS12 DG128 Learning Kit
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
19.3.2.4
This register selects the prescale clock source for clocks A and B independently.
Read: Anytime
Write: Anytime
702
Module Base + 0x0003
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
PCKB[2:0]
PCKA[2:0]
s
Reset
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
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
PWM Prescale Clock Select Register (PWMPRCLK)
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
MC9S12XE-Family Reference Manual , Rev. 1.23
Table 19-2. Clock B Prescaler Selects
Table 19-3. Clock A Prescaler Selects
PCKB1
PCKB1
PCKA1
5
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
PCKB0
NOTE
PCKB0
0
4
PCKA0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Description
0
0
3
Value of Clock B
Value of Clock A
Table
Table
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
19-2.
19-3.
PCKA2
2
0
PCKA1
Freescale Semiconductor
0
1
PCKA0
0
0