mc9s08qb8 Freescale Semiconductor, Inc, mc9s08qb8 Datasheet - Page 3

• Manufacturer Part Number: mc9s08qb8
• Description: 8-bit Hcs08 Central Processor Unit
• Manufacturer: Freescale Semiconductor, Inc

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The block diagram shows the structure of the MC9S08QB8 MCU.
Freescale Semiconductor
V
V
SS
DD
1
V
DDA
/V
MCU Block Diagram
REFH
(MC9S08QB8 = 8192 BYTES)
(MC9S08QB4 = 4096 BYTES)
COP
(MC9S08QB8 = 512 BYTES)
(MC9S08QB4 = 256 BYTES)
HCS08 SYSTEM CONTROL
RESETS AND INTERRUPTS
LOW-POWER OSCILLATOR
20 MHz INTERNAL CLOCK
VOLTAGE REGULATOR
MODES OF OPERATION
POWER MANAGEMENT
CPU
and V
31.25 kHz to 38.4 kHz
1 MHz to 16 MHz
SOURCE (ICS)
HCS08 CORE
USER FLASH
USER RAM
pins not available on 16-pin package
pins not available on 24-pin or 16-pin packages
SSA
(XOSC)
IRQ
/V
REFL
are double bonded to V
BDC
LVD
Figure 1. MC9S08QB8 Series Block Diagram
MC9S08QB8 Series MCU Data Sheet, Rev. 2
V
V
REFL
REFH
/V
DD
/V
SSA
DDA
and V
SS
respectively in16-pin package.
SERIAL COMMUNICATIONS
INTERFACE MODULE (SCI)
ANALOG COMPARATOR
KEYBOARD INTERRUPT
REAL-TIME COUNTER
8-BIT MODULO TIMER
ANALOG-TO-DIGITAL
CONVERTER (ADC)
16-BIT TIMER/PWM
MODULE (MTIM)
MODULE (TPM)
(ACMP)
12-BIT
(RTC)
(KBI)
PTA1/KBIP1/ADP1/ACMP–
PTA0/KBIP0/TPMCH0/ADP0/ACMP+
PTA5/IRQ/TCLK/RESET
PTA4/ACMPO/BKGD/MS
PTA3/KBIP3/ADP3
PTA2/KBIP2/ADP2
PTA7
PTA6
PTB7/EXTAL
PTB6/XTAL
PTB5/TPMCH0
PTB4
PTB3/KBIP7/ADP7
PTB2/KBIP6/ADP6
PTB1/KBIP5/TxD/ADP5
PTB0/KBIP4/RxD/ADP4
PTC7
PTC6
PTC5
PTC4
PTC3
PTC2
PTC1
PTC0
MCU Block Diagram
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