MCU Block Diagram
1
MCU Block Diagram
The block diagram, Figure 1, shows the structure of MC9S08QE8 series MCU.
BKGD/MS
HCS08 CORE
DEBUG MODULE (DBG)
BDC
CPU
REAL-TIME COUNTER
(RTC)
PTA7/TPM2CH2/ADP9
HCS08 SYSTEM CONTROL
PTA6/TPM1CH2/ADP8
SCL
SDA
PTA5/IRQ/TCLK/RESET
RESETS AND INTERRUPTS
MODES OF OPERATION
POWER MANAGEMENT
IIC MODULE (IIC)
PTA4/ACMP1O/BKGD/MS
PTA3/KBIP3/SCL/ADP3
IRQ
RxD
TxD
SERIAL COMMUNICATIONS
INTERFACE MODULE (SCI)
PTA2/KBIP2/SDA/ADP2
COP
IRQ
LVD
PTA1/KBIP1/TPM2CH0/ADP1/ACMP1–
PTA0/KBIP0/TPM1CH0/ADP0/ACMP1+
SS
MISO
USER FLASH
(MC9S08QE8 = 8192 BYTES)
(MC9S08QE4 = 4096 BYTES)
PTB7/SCL/EXTAL
SERIAL PERIPHERAL
INTERFACE MODULE (SPI)
MOSI
SPSCK
PTB6/SDA/XTAL
PTB5/TPM1CH1/SS
PTB4/TPM2CH1/MISO
PTB3/KBIP7/MOSI/ADP7
PTB2/KBIP6/SPSCK/ADP6
PTB1/KBIP5/TxD/ADP5
PTB0/KBIP4/RxD/ADP4
TCLK
USER RAM
(MC9S08QE8 = 512 BYTES)
(MC9S08QE4 = 256 BYTES)
TPM1CH0
16-BIT TIMER PWM
MODULE (TPM1)
TPM1CH1
TPM1CH2
TCLK
20 MHz INTERNAL CLOCK
SOURCE (ICS)
TPM2CH0
16-BIT TIMER PWM
MODULE (TPM2)
PTC7/ACMP2–
PTC6/ACMP2+
PTC5/ACMP2O
PTC4
TPM2CH1
TPM2CH2
LOW-POWER OSCILLATOR
31.25 kHz to 38.4 kHz
1 MHz to 16 MHz
EXTAL
XTAL
(XOSCVLP)
ACMP1O
ACMP1–
ACMP1+
VSSA
VDDA
ANALOG COMPARATOR
(ACMP1)
PTC3
VSS
VDD
PTC2
VOLTAGE REGULATOR
ACMP2O
ACMP2–
ACMP2+
PTC1/TPM2CH2
PTC0/TPM1CH2
VSSA
VDDA
ANALOG COMPARATOR
(ACMP2)
VSSA/VREFL
VDDA/VREFH
PTD3
PTD2
PTD1
PTD0
12-BIT
ANALOG-TO-DIGITAL
CONVERTER (ADC12)
ADP9–ADP0
KBIP7–KBIP0
VREFL
VREFH
KEYBOARD INTERRUPT
MODULE (KBI)
pins not available on 16-pin packages
pins not available on 16-pin or 20-pin packages
pins not available on 16-pin, 20-pin or 28-pin packages
Notes: When PTA5 is configured as RESET, pin becomes bi-directional with output being open-drain drive containing an internal pullup device.
When PTA4 is configured as BKGD, pin becomes bi-directional.
For the 16-pin and 20-pin packages, VSSA/VREFL and VDDA/VREFH are double bonded to VSS and VDD respectively.
Figure 1. MC9S08QE8 Series Block Diagram
MC9S08QE8 Series, Rev. 3
Freescale Semiconductor
Preliminary
3
Subject to Change Without Notice
FREESCALE [ Freescale ]
