MC68376BAMAB20 Freescale Semiconductor, MC68376BAMAB20 Datasheet - Page 219

• Manufacturer Part Number: MC68376BAMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BAMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

10.4 Bus Interface Unit Submodule (BIUSM)
10.4.1 STOP Effect On the BIUSM
10.4.2 Freeze Effect On the BIUSM
MC68336/376
USER’S MANUAL
In the CTM4, TBB2 is global and accessible to every submodule. TBB1 and TBB4 are
split to form two local time base buses. Table 10-1 shows which time base buses are
available to each CTM4 submodule.
Each PWMSM has an independent 16-bit counter and 8-bit prescaler clocked by the
PCLK1 signal, which is generated by the CPSM. The PWMSMs are not connected to
any of the time base buses. Refer to 10.9 Pulse-Width Modulation Submodule
(PWMSM) for more information.
The BIUSM connects the SMB to the IMB and allows the CTM4 submodules to com-
municate with the CPU32. The BIUSM also communicates CTM4 submodule interrupt
requests to the IMB, and transfers the interrupt level, arbitration number and vector
number to the CPU32 during the interrupt acknowledge cycle.
When the CPU32 STOP instruction is executed, only the CPU32 is stopped; the CTM4
continues to operate as normal.
CTM4 response to assertion of the IMB FREEZE signal is controlled by the FRZ bit in
the BIUSM configuration register (BIUMCR). Since the BIUSM propagates FREEZE
to the CTM4 submodules via the SMB, the setting of FRZ affects all CTM4 submod-
ules.
If the IMB FREEZE signal is asserted and FRZ = 1, all CTM4 submodules freeze. The
following conditions apply when the CTM4 is frozen:
Submodule
MCSM 11
FCSM 12
DASM10
DASM9
• All submodule registers can still be accessed.
• The CPSM, FCSM, MCSM, and PWMSM counters stop counting.
• The IN status bit still reflects the state of the FCSM external clock input pin.
• The IN2 status bit still reflects the state of the MCSM external clock input pin, and
• DASM capture and compare functions are disabled.
• The DASM IN status bit still reflects the state of its associated pin in the DIS,
• When configured for OCB, OCAB, or OPWM modes, the state of the DASM
the IN1 status bit still reflects the state of the MCSM modulus load input pin.
IPWM, IPM, and IC modes. In the OCB, OCAB, and OPWM modes, IN reflects
the state of the DASM output flip flop.
Global Bus A
Global/Local Time Base
TBB1
TBB1
TBB1
TBB1
Table 10-1 CTM4 Time Base Bus Allocation
Bus Allocation
CONFIGURABLE TIMER MODULE 4
Global Bus B
TBB2
TBB2
TBB2
TBB2
Submodule
MCSM 2
DASM 3
DASM 4
Global Bus A
Global/Local Time Base
TBB4
TBB4
TBB4
Bus Allocation
Global Bus B
MOTOROLA
TBB2
TBB2
TBB2
10-3