MC68F375
TIME PROCESSOR UNIT 3
MOTOROLA
REFERENCE MANUAL
Rev. 25 June 03
8-12
8.4.2 TPU3 Test Configuration Register
TCR — TPU3 Test Configuration Register
0x30 4002, 0x30 4402
Used for factory test only.
8.4.3 Development Support Control Register
4T2CSL
TCR2 counter clock edge. This bit and the T2CG control bit determine the clock source for TCR2.
3:0
IARB[3:0]
Interrupt Arbitration ID. The IARB field is used to arbitrate between simultaneous interrupt
requests of the same priority. Each module that can generate interrupt requests must be
assigned a unique, non-zero IARB field value.
DSCR — Development Support Control Register
0xYF FE04
MSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LSB
0
HOT4
RESERVED
BLC
CLKS
FRZ
CCL
BP
BC
BH
BL
BM
BT
RESET:
0
Table 8-7 DSCR Bit Settings
Bit(s)
Name
Description
15
HOT4
Hang on T4
0 = Exit wait on T4 state caused by assertion of HOT4
1 = Enter wait on T4 state
14:11
—
Reserved
10
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
9CLKS
Stop clocks (to TCRs)
0 = Do not stop TCRs
1 = Stop TCRs during the halted state
8:7
FRZ
FREEZE assertion response. The FRZ bits specify the TPU microengine response to the IMB3
FREEZE signal
00 = Ignore freeze
01 = Reserved
10 = Freeze at end of current microcycle
11 = Freeze at next time-slot boundary
6
CCL
Channel conditions latch. CCL controls the latching of channel conditions (MRL and TDL) when
the CHAN register is written.
0 = Only the pin state condition of the new channel is latched as a result of the write CHAN reg-
ister microinstruction
1 = Pin state, MRL, and TDL conditions of the new channel are latched as a result of a write
CHAN register microinstruction
5BP
PC breakpoint enable
0 = Breakpoint not enabled
1 = Break if
PC equals PC breakpoint register
Table 8-6 TPUMCR Bit Settings (Continued)
Bit(s)
Name
Description
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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