mc9s08sg4 Freescale Semiconductor, Inc, mc9s08sg4 Datasheet - Page 25

• Manufacturer Part Number: mc9s08sg4
• Description: 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

2.2
Figure 2-4
2.2.1
V
I/O buffer circuitry, ACMP and ADC modules, and to an internal voltage regulator. The internal voltage
regulator provides regulated lower-voltage source to the CPU and other internal circuitry of the MCU.
Typically, application systems have two separate capacitors across the power pins. In this case, there
should be a bulk electrolytic capacitor, such as a 10-μF tantalum capacitor, to provide bulk charge storage
Freescale Semiconductor
DD
V
DD
OPTIONAL
MANUAL
RESET
SYSTEM
POWER
and V
BACKGROUND HEADER
NOTES:
Recommended System Connections
PTC0/TPM1CH0/ADP8
PTC1/TPM1CH1/ADP9
1. External crystal circuit not required if using the internal clock option.
2. RESET pin can only be used to reset into user mode, you can not enter BDM using RESET
3. RC filter on RESET pin recommended for noisy environments.
shows pin connections that are common to MC9S08SG8 application systems.
Power
SS
5 V
pin. BDM can be entered by holding MS low during POR or writing a 1 to BDFR in SBDFR
with MS low after issuing BDM command.
+
are the primary power supply pins for the MCU. This voltage source supplies power to all
PTC2/ADP10
PTC3/ADP11
10 μF
C
BLK
+
V
DD
C
0.1 μF
4.7 kΩ–10 kΩ
BY
0.1 μF
MC9S08SG8 MCU Series Data Sheet, Rev. 3
Figure 2-4. Basic System Connections
V
V
PORT
SS
DD
C
BKGD/MS
RESET
MC9S08SG8
PORT
PORT
A
B
C1
PTA0/PIA0/TPM1CH0/TCLK/ADP0/ACMP+
PTA1/PIA1/TPM2CH0/ADP1/ACMP-
PTA2/PIA2/SDA/ADP2/ACMPO
PTA3/PIA3/SCL/ADP3
PTB0/PIB0/RxD/ADP4
PTB1/PIB1/TxD/ADP5
PTB2/PIB2/SPSCK/ADP6
PTB3/PIB3/MOSI/ADP7
PTB4/TPM2CH1/MISO
PTB5/TPM1CH1/SS
PTB6/SDA/XTAL
PTB7/SCL/EXTAL
X1
Chapter 2 Pins and Connections
R
F
NOTE 1
C2
R
S
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