MC68908GZ8MFJE Datasheet, PDF (122/314 Pages) Freescale Semiconductor, Inc – Microcontrollers

MSCAN08 Controller (MSCAN08)
M68HC08 CPU
CPU
REGISTERS
ARITHMETIC/LOGIC
UNIT (ALU)
CONTROL AND STATUS REGISTERS — 64 BYTES
USER FLASH — 15,872 BYTES
USER RAM — 1024 BYTES
MONITOR ROM — 350 BYTES
FLASH PROGRAMMING ROUTINES ROM — 406 BYTES
USER FLASH VECTOR SPACE — 44 BYTES
OSC1
OSC2
CGMXFC
CLOCK GENERATOR MODULE
1–8 MHz OSCILLATOR
PHASE LOCKED LOOP
RST⁽³⁾
IRQ⁽³⁾
V_DDAD/V_REFH
V_DDAD/V_REFL
V_DD
V_SS
V_DDA
V_SSA
SYSTEM INTEGRATION
MODULE
SINGLE EXTERNAL
INTERRUPT MODULE
10-BIT ANALOG-TO-DIGITAL
CONVERTER MODULE
POWER-ON RESET
MODULE
POWER
INTERNAL BUS
PROGRAMMABLE TIMEBASE
MODULE
SINGLE BREAKPOINT
BREAK MODULE
DUAL VOLTAGE
LOW-VOLTAGE INHIBIT
MODULE
8-BIT KEYBOARD
INTERRUPT MODULE
2-CHANNEL TIMER
INTERFACE MODULE 1
2-CHANNEL TIMER
INTERFACE MODULE 2
ENHANCED SERIAL
COMUNICATIONS
INTERFACE MODULE
COMPUTER OPERATING
PROPERLY MODULE
SERIAL PERIPHERAL
INTERFACE MODULE
MONITOR MODULE
MEMORY MAP
MODULE
CONFIGURATION
REGISTER 1–2
MODULE
MSCAN08 MODULE
PTA7/KBD7–
PTA0/KBD0⁽¹⁾
PTB7/AD7
PTB6/AD6
PTB5/AD5
PTB4/AD4
PTB3/AD3
PTB2/AD2
PTB1/AD1
PTB0/AD0
PTC6⁽¹⁾
PTC5⁽¹⁾
PTC4^{(1), (2)}
PTC3^{(1), (2)}
PTC2^{(1), (2)}
PTC1/CAN_RX(1), ⁽²⁾
PTC0/CAN_TX(1), ⁽²⁾
PTD7/T2CH1⁽¹⁾
PTD6/T2CH0⁽¹⁾
PTD5/T1CH1⁽¹⁾
PTD4/T1CH0⁽¹⁾
PTD3/SPSCK⁽¹⁾
PTD2/MOSI⁽¹⁾
PTD1/MISO⁽¹⁾
PTD0/SS⁽¹⁾
PTE5–PTE2
PTE1/RxD
PTE0/TxD
SECURITY
MODULE
MONITOR MODE ENTRY
MODULE
1. Ports are software configurable with pullup device if input port.
2. Higher current drive port pins
3. Pin contains integrated pullup device
Figure 12-1. Block Diagram Highlighting MSCAN08 Block and Pins
12.3 External Pins
The MSCAN08 uses two external pins, one input (CAN_RX) and one output (CAN_TX). The CAN_TX output
pin represents the logic level on the CAN: 0 is for a dominant state, and 1 is for a recessive state.
A typical CAN system with MSCAN08 is shown in Figure 12-2.
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
122
Freescale Semiconductor