MC68HC908JK8CP Freescale Semiconductor, MC68HC908JK8CP Datasheet - Page 61

• Manufacturer Part Number: MC68HC908JK8CP
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908JK8CP

• Cpu Family: HC08
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SCI
• Program Memory Type: Flash
• Program Memory Size: 8KB
• Total Internal Ram Size: 256Byte
• # I/os (max): 15
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 13-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 20
• Package Type: PDIP
• Lead Free Status / Rohs Status: Not Compliant

Chapter 5
System Integration Module (SIM)
5.1 Introduction
This section describes the system integration module (SIM), which supports up to 24 external and/or
internal interrupts. Together with the CPU, the SIM controls all MCU activities. A block diagram of the SIM
is shown in
controller that coordinates CPU and exception timing.
The SIM is responsible for:
Table 5-1
Freescale Semiconductor
•
•
•
•
•
Bus clock generation and control for CPU and peripherals
–
–
Master reset control, including power-on reset (POR) and COP timeout
Interrupt control:
–
–
–
CPU enable/disable timing
Modular architecture expandable to 128 interrupt sources
Signal Name
shows the internal signal names used in this section.
Stop/wait/reset/break entry and recovery
Internal clock control
Acknowledge timing
Arbitration control timing
Vector address generation
OSCOUT
PORRST
Figure
ICLK
IRST
R/W
IAB
IDB
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
5-1.
Figure 5-2
Internal oscillator clock
The XTAL or RC frequency divided by two. This signal is again divided by two in the SIM
to generate the internal bus clocks. (Bus clock = OSCOUT ÷ 2)
Internal address bus
Internal data bus
Signal from the power-on reset module to the SIM
Internal reset signal
Read/write signal
Table 5-1. Signal Name Conventions
is a summary of the SIM I/O registers. The SIM is a system state
Description
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