Time Processor Unit 3
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
19-15
19.4.5
Channel Interrupt Enable Register (CIER)
The channel interrupt enable register (CIER) allows the CPU to enable or disable the ability of individual
TPU3 channels to request interrupt service. Setting the appropriate bit in the register enables a channel to
make an interrupt service request; clearing a bit disables the interrupt.
19.4.6
Channel Function Select Registers (CFSR
n
)
Encoded 4-bit fields within the channel function select registers specify one of 16 time functions to be
executed on the corresponding channel. Encodings for predefined functions are found in
and
.
Table 19-10. TICR Bit Description
Bits
Name
Description
0:4
—
Reserved
5:7
CIRL
Channel interrupt request level. This three-bit field specifies the interrupt request level for all
channels. This field is used in conjunction with the ILBS field to determine the request level of
TPU3 interrupts.
8:9
ILBS
Interrupt level byte select. This field and the CIRL field determine the level of TPU3 interrupt
requests.
00 IRQ[0:7] selected
01 IRQ[8:15] selected
10 IRQ[16:23] selected
11 IRQ[24:31] selected
10:15
—
Reserved. Note that bits 10:11 represent channel interrupt base vector (CIBV) bits in some TPU3
implementations.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
CH
15
CH
14
CH
13
CH
12
CH
11
CH
10
CH 9 CH 8 CH 7 CH 6 CH 5 CH 4 CH 3 CH 2 CH 1 CH 0
SRESET
0000_0000_0000_0000
Addr
0x30 400A (TPU_A), 0x30 440A (TPU_B)
Figure 19-9. CIER — Channel Interrupt Enable Register
Table 19-11. CIER Bit Descriptions
Bits
Name
Description
0:15
CH[15:0]
Channel interrupt enable/disable
0
Channel interrupts disabled
1
Channel interrupts enabled
NOTE: The MSB (bit 0) represents CH15, and the LSB (bit 15) represents CH0.
Summary of Contents for MPC561
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