MC9S08QE8 Datasheet, PDF (3/46 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit

1 MCU Block Diagram
The block diagram, Figure 1, shows the structure of MC9S08QE8 series MCU.
MCU Block Diagram
HCS08 CORE
CPU
BDC
HCS08 SYSTEM CONTROL
RESETS AND INTERRUPTS
MODES OF OPERATION
POWER MANAGEMENT
COP
IRQ
LVD
USER FLASH
(MC9S08QE8 = 8192 BYTES)
(MC9S08QE4 = 4096 BYTES)
USER RAM
(MC9S08QE8 = 512 BYTES)
(MC9S08QE4 = 256 BYTES)
20 MHz INTERNAL CLOCK
SOURCE (ICS)
LOW-POWER OSCILLATOR
31.25 kHz to 38.4 kHz
1 MHz to 16 MHz
(XOSCVLP)
V_SS
V_DD
VOLTAGE REGULATOR
V_SSA/V_REFL
V_DDA/V_REFH
V_REFL
V_REFH
BKGD/MS
DEBUG MODULE (DBG)
REAL-TIME COUNTER
(RTC)
SCL
IIC MODULE (IIC)
SDA
IRQ
SERIAL COMMUNICATIONS ^RxD
INTERFACE MODULE (SCI) ^TxD
SERIAL PERIPHERAL
INTERFACE MODULE (SPI)
16-BIT TIMER PWM
MODULE (TPM1)
EXTAL
XTAL
V_SSA
V_DDA
V_SSA
V_DDA
16-BIT TIMER PWM
MODULE (TPM2)
ANALOG COMPARATOR
(ACMP1)
ANALOG COMPARATOR
(ACMP2)
SS
MISO
MOSI
SPSCK
TCLK
TPM1CH0
TPM1CH1
TPM1CH2
TCLK
TPM2CH0
TPM2CH1
TPM2CH2
ACMP1O
ACMP1–
ACMP1+
ACMP2O
ACMP2–
ACMP2+
12-BIT
ANALOG-TO-DIGITAL
CONVERTER (ADC12)
ADP9–ADP0
PTA7/TPM2CH2/ADP9
PTA6/TPM1CH2/ADP8
PTA5/IRQ/TCLK/RESET
PTA4/ACMP1O/BKGD/MS
PTA3/KBIP3/SCL/ADP3
PTA2/KBIP2/SDA/ADP2
PTA1/KBIP1/TPM2CH0/ADP1/ACMP1–
PTA0/KBIP0/TPM1CH0/ADP0/ACMP1+
PTB7/SCL/EXTAL
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
PTC7/ACMP2–
PTC6/ACMP2+
PTC5/ACMP2O
PTC4
PTC3
PTC2
PTC1/TPM2CH2
PTC0/TPM1CH2
PTD3
PTD2
PTD1
PTD0
KEYBOARD INTERRUPT
MODULE (KBI)
KBIP7–KBIP0
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, V_SSA/V_REFL and V_DDA/V_REFH are double bonded to V_SS and V_DD respectively.
Figure 1. MC9S08QE8 Series Block Diagram
MC9S08QE8 Series, Rev. 3
Freescale Semiconductor
Preliminary
3
Subject to Change Without Notice