Datasheet

Chapter 14 Serial Communications Interface (S08SCIV4)
MC9S08SG8 MCU Series Data Sheet, Rev.8
200 Freescale Semiconductor
Figure 14-1. MC9S08SG8 Block Diagram with SCI Module Highlighted
PTB7/SCL/EXTAL
PORT B
PTB6/SDA/XTAL
PTB5/TPM1CH1/SS
PTB4/TPM2CH1/MISO
PTB3/PIB3/MOSI/ADP7
PTB2/PIB2/SPSCK/ADP6
PORT A
PTA1/PIA1/TPM2CH0/ADP1/ACMP–
PTB1/PIB1/TxD/ADP5
PTB0/PIB0/RxD/ADP4
PORT C
PTC3/ADP11
PTC2/ADP10
PTC1/TPM1CH1/ADP9
PTC0/TPM1CH0/ADP8
PTA3/PAI3/SCL/ADP3
PTA2/PAI2/SDA/ADP2/ACMPO
PTA0/PIA0/TPM1CH0/TCLK/ADP0/ACMP+
SEE NOTE 1, 2
SEE NOTE 1, 2
= Pin can be enabled as part of the ganged output drive feature.
NOTE 1:
Port B not available on 8-pin packages
NOTE 2: Port C not available on 8-pin or 16-pin packages.
IIC MODULE (IIC)
SERIAL PERIPHERAL
INTERFACE MODULE (SPI)
USER FLASH
USER RAM
HCS08 CORE
CPU
BDC
HCS08 SYSTEM CONTROL
RESETS AND INTERRUPTS
MODES OF OPERATION
POWER MANAGEMENT
COP
LVD
INTERFACE MODULE (SCI)
SERIAL COMMUNICATIONS
8-BIT MODULO TIMER
MODULE (MTIM)
VOLTAGE
DEBUG MODULE (DBG)
MISO
SCL
SDA
MOSI
SPSCK
RxD
TxD
LOW-POWER OSCILLATOR
40-MHz INTERNAL CLOCK
SOURCE (ICS)
31.25 kHz to 38.4 kHz
1 MHz to 16 MHz
(XOSC)
EXTAL
XTAL
V
SS
V
DD
V
SSA
V
DDA
V
REFL
V
REFH
ANALOG-TO-DIGITAL
CONVERTER (ADC)
10-BIT
SS
TCLK
BKGD/MS
16-BIT TIMER/PWM
MODULE (TPM2)
TCLK
REAL-TIME COUNTER (RTC)
(MC9S08SG8 = 8,192 BYTES)
(MC9S08SG4 = 4096 BYTES)
(MC9S08SG8 = 512 BYTES)
ANALOG COMPARATOR
(ACMP)
ACMPO
ACMP–
ACMP+
TPM2CH0
TPM2CH1
ADP11-ADP0
16-BIT TIMER/PWM
MODULE (TPM1)
TCLK
TPM1CH0
TPM1CH1
(MC9S08SG4 = 256 BYTES)
NOTE 3: V
DDA
/V
REFH
and V
SSA
/V
REFL
, are double bonded to V
DD
and V
SS
respectively.
RESET
SEE NOTE 3
NOTES
REGULATOR