Datasheet

MCU Block Diagram
MC9S08SE8 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor 3
1 MCU Block Diagram
The block diagram, Figure 1, shows the structure of the MC9S08SE8 series MCUs.
Figure 1. MC9S08SE8 Series Block Diagram
USER FLASH
USER RAM
HCS08 CORE
CPU
BDC
PTB7/EXTAL
PORT B
HCS08 SYSTEM CONTROL
RESETS AND INTERRUPTS
MODES OF OPERATION
POWER MANAGEMENT
COP
LVD
PTB6/XTAL
PTB5
PTB4/TPM2CH0
PTB3/KBIP7/ADP9
PTB2/KBIP6/ADP8
VOLTAGE REGULATOR
PORT A
PTA1/KBIP1/TPM1CH1/ADP1
LOW-POWER OSCILLATOR
20 MHz INTERNAL CLOCK
SOURCE (ICS)
31.25 kHz to 38.4 kHz
1 MHz to 16 MHz
(XOSC)
V
SS
V
DD
ANALOG-TO-DIGITAL
CONVERTER (ADC)
10-CHANNEL, 10-BIT
PTB1/KBIP5/TxD/ADP7
PTB0/KBIP4/RxD/ADP6
PORT C
PTC7
PTC6
PTC5
PTC4
(MC9S08SE8 = 8192 BYTES)
(MC9S08SE4 = 4096 BYTES)
(MC9S08SE8 = 512 BYTES)
(MC9S08SE4 = 256 BYTES)
PTA3/KBIP3/ADP3
PTA2/KBIP2/ADP2
PTA0/KBIP0/TPM1CH0/ADP0
PTA4/BKGD/MS
PTA5/IRQ/TCLK/RESET
IRQ
pins not available on 16-pin package
PTA7/TPM1CH1/ADP5
PTA6/TPM1CH0/ADP4
PTC3
PTC2
PTC1
PTC0
V
SSA
/V
REFL
V
DDA
/V
REFH
BKGD/MS
IRQ
EXTAL
XTAL
V
REFL
V
REFH
RxD
TxD
DEBUG MODULE (DBG)
ADP9–ADP0
TCLK
TPM2CH0
1-CHANNEL TIMER/PWM
MODULE (TPM2)
KEYBOARD INTERRUPT
MODULE (KBI)
KBIP7–KBIP0
V
SSA
V
DDA
Notes:
When PTA4 is configured as BKGD, pin is bi-directional.
For the 16-pin package: V
SSA
/V
REFL
and V
DDA
/V
REFH
are double bonded to V
SS
and V
DD
respectively.
INTERFACE MODULE (SCI)
SERIAL COMMUNICATIONS
TCLK
TPM1CH1–TPM1CH0
2-CHANNEL TIMER/PWM
MODULE (TPM1)
REAL-TIME COUNTER (RTC)