MC9S08SG32 Datasheet, PDF (25/328 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Chapter 2 Pins and Connections
2.2 Recommended System Connections
Figure 2-4 shows pin connections that are common to MC9S08SG32 Series application systems.
BACKGROUND HEADER
V_DD
V_DD
4.7 kΩ–10 kΩ
OPTIONAL
MANUAL
RESET
0.1 μF
MC9S08SG32
BKGD/MS
RESET
PORT
A
PTC0/TPM1CH0/ADP8
PTC1/TPM1CH1/ADP9
PTC2/ADP10
PTC3/ADP11
PTC4/ADP12
PTC5/ADP13
PTC6/ADP14
PTC7/ADP15
+
5V
C_BLK +
10 μF
C_BY
0.1 μF
SYSTEM
POWER
C_BY
0.1 μF
PORT
C
V_DD
V_SS
V_DDA\V_REFH
V_SSA\V_REFL
PORT
B
PTA0/PIA0/TPM1CH0/TCLK/ADP0/ACMP+
PTA1/PIA1/TPM2CH0/ADP1/ACMP–
PTA2/PIA2/SDA/ACMPO/ADP2
PTA3/PIA3/SCL/ADP3
PTA6/TPM2CH0
PTA7/TPM2CH1
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
R_F
R_S
C1
X1
C2
NOTE 1
NOTES:
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 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.
3. RC filter on RESET pin recommended for noisy environments.
4. For the 16-pin and 20-pin packages: V_DDA/V_REFH and V_SSA/V_REFL are double bonded to V_DD and V_SS respectively.
Figure 2-4. Basic System Connections
2.2.1 Power
V_DD and V_SS are the primary power supply pins for the MCU. This voltage source supplies power to all
I/O buffer circuitry 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.
MC9S08SG32 Data Sheet, Rev. 7
Freescale Semiconductor
25