Datasheet
Chapter 2 Pins and Connections
MC9S08AC16 Series Data Sheet, Rev. 9
Freescale Semiconductor 29
Table 2-2. Pin Function Reference
Signal Function Example(s) Reference
Port Pins PTAx, PTBx Chapter 6, “Parallel Input/Output”
Serial peripheral interface SS
, MISO, MOSI, SPSCK Chapter 12, “Serial Peripheral Interface (S08SPIV3)”
Keyboard interrupts KBIPx Chapter 9, “Keyboard Interrupt (S08KBIV1)”
Timer/PWM TCLK, TPMCHx Chapter 10, “Timer/PWM (S08TPMV3)”
Inter-integrated circuit SCL, SDA Chapter 13, “Inter-Integrated Circuit (S08IICV2)”
Serial communications interface TxD, RxD Chapter 11, “Serial Communications Interface (S08SCIV4)”
Oscillator/clocking EXTAL, XTAL Chapter 8, “Internal Clock Generator (S08ICGV4)”
Analog-to-digital ADPx Chapter 14, “Analog-to-Digital Converter (S08ADC10V1)”
Power/core BKGD/MS, V
DD
, V
SS
Chapter 2, “Pins and Connections”
Reset and interrupts RESET
, IRQ Chapter 5, “Resets, Interrupts, and System Configuration”
Pin Number <-- Lowest Priority --> Highest
48 44 42 32 Port Pin Alt 1 Alt 2
11——PTC4
2261 IRQ TPMCLK
3 3 7 2 RESET
4 4 8 — PTF0 TPM1CH2
5 5 9 — PTF1 TPM1CH3
6 6 10 3 PTF4 TPM2CH0
7 7 11 4 PTF5 TPM2CH1
8———PTF6
9 8 12 5 PTE0 TxD1
10 9 13 6 PTE1 RxD1
11 10 14 7 PTE2 TPM1CH0
12 11 15 8 PTE3 TPM1CH1
13 12 16 9 PTE4 SS1
14 13 17 10 PTE5 MISO1
15 14 18 11 PTE6 MOSI1
16 15 19 12 PTE7 SPSCK1
17 16 20 13 V
SS
18 17 21 14 V
DD
19 18 22 15 PTG0 KBIP0
20 19 23 16 PTG1 KBIP1
21 20 24 — PTG2 KBIP2
22 21 25 — PTA0
23 22 — — PTA1
24 — — — PTA2
25 — — — PTA7
26 23 26 17 PTB0 TPM3CH0 AD1P0
27 24 27 18 PTB1 TPM3CH1 AD1P1
28 25 28 19 PTB2 AD1P2
29 26 29 20 PTB3 AD1P3
30 27 30 — PTD0 AD1P8
31 28 31 — PTD1 AD1P9
32 29 32 21 V
DDAD
33 30 33 22 V
SSAD
34 31 34 23 PTD2 AD1P10 KBIP5
35 32 35 24 PTD3 AD1P11 KBIP6
36 33 36 — PTG3 KBIP3
37 — — — PTG4 KBIP4
38 34 37 25 V
REFH
39 35 38 26 V
REFL
40 36 39 27 BKGD MS
41 37 40 28 PTG5 XTAL
42 38 41 29 PTG6 EXTAL
43 39 42 30 V
SS
44 40 1 31 PTC0 SCL1
45 41 2 32 PTC1 SDA1
46 42 3 — PTC2 MCLK
47 43 4 — PTC3 TxD2
48 44 5 — PTC5 RxD2
Pin Number <-- Lowest Priority --> Highest
48 44 42 32 Port Pin Alt 1 Alt 2
Table 2-1. Pin Availability by Package Pin-Count