Time Processor Unit 3
MPC561/MPC563 Reference Manual, Rev. 1.2
19-12
Freescale Semiconductor
19.4.2
Development Support Control Register (DSCR)
This register is accessible only when the TPU is in test mode; see
Section 19.4.14, “Factory Test
9
PSCK
Standard prescaler clock. Note that this bit has no effect if the extended prescaler is selected
(EPSCKE = 1).
0 f
SYS
÷
32 is input to TCR1 prescaler, if standard prescaler is selected
1 f
SYS
÷
4 is input to TCR1 prescaler, if standard prescaler is selected
10
TPU3
TPU3 enable. The TPU3 enable bit provides compatibility with the TPU. If running TPU code on
the TPU3, the microcode size should not be greater than 2 Kbytes and the TPU3 enable bit
should be cleared to zero. The TPU3 enable bit is write-once after reset. The reset value is one,
meaning that the TPU3 will operate in TPU3 mode.
0 TPU mode; zero is the TPU reset value
1 TPU3 mode; one is the TPU3 reset value
NOTE: The programmer should not change this value unless necessary when developing
custom TPU microcode.
11
T2CSL
TCR2 counter clock edge. This bit and the T2CG control bit determine the clock source for TCR2.
Refer to
Section 19.3.9, “Prescaler Control for TCR2
” for details.
12:15
—
Reserved. These bits are used for the IARB (interrupt arbitration ID) field in TPU3
implementations that use hardware interrupt arbitration.
1
If all TPUs connected to a DPTRAM are stopped, the DPTRAM is accessible.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field HOT4
—
BLC CLKS
FRZ
CCL
BP
BC
BH
BL
BM
BT
SRESET
0000_0000_0000_0000
Addr
0x30 4004 (TPU_A), 0x30_4404 (TPU_B)
Figure 19-6. DSCR — Development Support Control Register
Table 19-8. DSCR Bit Descriptions
Bits
Name
Description
0
HOT4
Hang On T4
1
0 Exit wait on T4 state caused by assertion of HOT4
1 Enter wait on T4 state
1:4
—
Reserved
5
BLC
Branch Latch Control
0 Latch conditions into branch condition register before exiting halted state
1 Do not latch conditions into branch condition register before exiting the halted state or during
the time-slot transition period
6
CLKS
Stop clocks (to TCRs)
0 Do not stop TCRs
1 Stop TCRs during the halted state
Table 19-7. TPUMCR Bit Description (continued)
Bits
Name
Description
Summary of Contents for MPC561
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Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...