mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 323

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

14.6.1.2 Prescaler Control for TCR2
MC68HC16Y3/916Y3
USER’S MANUAL
T2CLK
DIV8 CLK
PIN
Timer count register 2 (TCR2), like TCR1, is clocked from the output of a prescaler.
The T2CG (TCR2 clock/gate control) bit and the T2CSL (TCR2 counter clock edge)
bit in TPUMCR determine T2CR2 pin functions. Refer to Table 14-2.
The function of the T2CG bit is shown in Figure 14-3.
SYSTEM
CLOCK
SYNCHRONIZER
32
2
4
T2CSL
Table 14-2 TCR2 Counter Clock Source
Freescale Semiconductor, Inc.
0
0
1
1
Figure 14-2 TCR1 Prescaler Control
Figure 14-3 TCR2 Prescaler Control
For More Information On This Product,
PROGRAMMABLE
DIV32 CLOCK
DIV2 CLOCK
DIV4 CLOCK
DIGITAL
DIGITAL
FILTER
FILTER
TIME PROCESSOR UNIT 2
Go to: www.freescale.com
0 – DIV32 CLOCK
1 – DIV4 CLOCK
PSCK
MUX
T2CG
A
B
0
1
0
1
T2CF BIT
MUX
0 – A
1 – B
PRESCALER
00 1
01 2
10 4
11 8
TCR1
Rise & fall transition T2CLK
T2CSL BIT
Rise transition T2CLK
Fall transition T2CLK
Gated system clock
TCR2 Clock
T2CG CONTROL BIT
A
B
0 – TCR1 PRESCALER
1 – DIV2
MUX
0 – A
1 – B
CSEL
MUX
PRESCALER
00 1
01 2
10 4
11 8
0
TCR2
TCR1
0
MOTOROLA
TPU2 PRE BLOCK 2
TPU PRE BLOCK 1
15
TCR2
14-15
15