Datasheet

MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
Freescale Semiconductor 137
Chapter 10
Analog-to-Digital Converter (S08ADCV1)
10.1 Introduction
The 10-bit analog-to-digital converter (ADC) is a successive approximation ADC designed for operation
within an integrated microcontroller system-on-chip.
NOTE
MC9S08EL32 Series and MC9S08SL16 Series devices operates at a higher
voltage range (2.7 V to 5.5 V) and does not include stop1 mode.
The ADC channel assignments, alternate clock function, and hardware trigger function are configured as
described below for the MC9S08EL32 Series and MC9S08SL16 Series family of devices.
10.1.1 Channel Assignments
The ADC channel assignments for the MC9S08EL32 Series and MC9S08SL16 Series devices are shown
in Table 10-1. Reserved channels convert to an unknown value.
Table 10-1. ADC Channel Assignment
ADCH Channel Input ADCH Channel Input
00000 AD0 PTA0/PIA0/TPM1CH0/TCLK/ACMP1+/ADP0 10000 AD16 V
REFL
00001 AD1 PTA1/PIA1/TPM2CH0/ACMP1-/ADP1 10001 AD17 V
REFL
00010 AD2 PTA2/PIA2/SDA/RxD/ACMP1O/ADP2 10010 AD18 V
REFL
00011 AD3 PTA3/PIA3/SCL/TxD/ADP3 10011 AD19 V
REFL
00100 AD4 PTB0/PIB0/SLRxD/RxD/ADP4 10100 AD20 V
REFL
00101 AD5 PTB1/PIB1/SLTxD/TxD/ADP5 10101 AD21 V
REFL
00110 AD6 PTB2/PIB2/SDA/SPSCK/ADP6 10110 AD22 V
REFL
00111 AD7 PTB3/PIB3/SCL/MOSI/ADP7 10111 AD23 V
REFL
01000 AD8 PTC0/PIC0/TPM1CH0/ADP8 11000 AD24 Reserved
01001 AD9 PTC1/PIC1/TPM1CH1/ADP9 11001 AD25 Reserved
01010 AD10 PTC2/PIC2/TPM1CH2/ADP10 11010 AD26 Temperature Sensor
1
1
For information, see Section 10.1.4, “Temperature Sensor”.
01011 AD11 PTC3/PIC3/TPM1CH3/ADP11 11011 AD27 Internal Bandgap
2
2
Requires BGBE =1 in SPMSC1 see Section 5.7.7, “System Power Management Status and Control 2 Register (SPMSC2)”.
For value of bandgap voltage reference see Section A.6, “DC Characteristics”.
01100 AD12 PTC4/PIC4/ADP12 11100
V
REFH
V
REFH
01101 AD13 PTC5/PIC5/ACMP2O/ADP13 11101 V
REFH
V
REFH
01110 AD14 PTC6/PIC6/ACMP2+/ADP14 11110 V
REFL
V
REFL
01111 AD15 PTC7/PIC7/ACMP2-/ADP15 11111 Module Disabled None