MC68HC908JB8JDW Freescale Semiconductor, MC68HC908JB8JDW Datasheet - Page 94

• Manufacturer Part Number: MC68HC908JB8JDW
• Description: IC MCU 8K FLASH 3MHZ 20-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB8JDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: USB
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

System Integration Module (SIM)
8.2 Introduction
Technical Data
94
8.7
8.7.1
8.7.2
8.8
8.8.1
8.8.2
8.8.3
This section describes the system integration module (SIM), which
supports up to 8 external and/or internal interrupts. Together with the
CPU, the SIM controls all MCU activities. The SIM is a system state
controller that coordinates CPU and exception timing. A block diagram
of the SIM is shown in
I/O registers. The SIM is responsible for:
•
•
•
•
•
Bus clock generation and control for CPU and peripherals
– Stop/wait/reset/break entry and recovery
– Internal clock control
Master reset control, including power-on reset (POR) and COP
timeout
Interrupt control:
– Acknowledge timing
– Arbitration control timing
– Vector address generation
CPU enable/disable timing
Modular architecture expandable to 128 interrupt sources
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
SIM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Reset Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Break Flag Control Register . . . . . . . . . . . . . . . . . . . . . . .116
System Integration Module (SIM)
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Figure
8-1.
Figure 8-2
is a summary of the SIM
Freescale Semiconductor