Datasheet

Enhanced Serial Communications Interface (ESCI) Module
MC68HC908GR16 Data Sheet, Rev. 5.0
148 Freescale Semiconductor
Figure 14-1. Block Diagram Highlighting ESCI Block and Pins
Table 14-1. Pin Name Conventions
Generic Pin Names RxD TxD
Full Pin Names PTE1/RxD PTE0/TxD
MONITOR MODULE
M68HC08 CPU
CONTROL AND STATUS REGISTERS — 64 BYTES
USER FLASH — 15,872 BYTES
USER RAM — 1024 BYTES
MONITOR ROM — 350 BYTES
USER FLASH VECTOR SPACE — 36 BYTES
PORTA
DDRA
DDRC
PORTC
DDRD
PORTD
DDRE
PORTE
INTERNAL BUS
OSC1
OSC2
RST
(3)
IRQ
(3)
PTA7/KBD7–
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
(1), (2)
PTC0
(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)
PTE1/RxD
PTE0/TxD
SECURITY
MODULE
POWER
V
SS
V
DD
V
SSA
V
DDA
1. Ports are software configurable with pullup device if input port.
2. Higher current drive port pins
3. Pin contains integrated pullup device
MONITOR MODE ENTRY
MODULE
DDRB
PORTB
V
DDAD
/V
REFH
V
SSAD
/V
REFL
PTE5–PTE2
FLASH PROGRAMMING ROUTINES ROM — 406 BYTES
CLOCK GENERATOR MODULE
CGMXFC
PHASE LOCKED LOOP
32–100 kHz OSCILLATOR
CPU
REGISTERS
ARITHMETIC/LOGIC
UNIT (ALU)
SYSTEM INTEGRATION
MODULE
SINGLE EXTERNAL
INTERRUPT MODULE
10-BIT ANALOG-TO-DIGITAL
CONVERTER MODULE
POWER-ON RESET
MODULE
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
MEMORY MAP
MODULE
CONFIGURATION
REGISTER 1–2
MODULE
PTA0/KBD0
(1)