MC9S08QG8 Datasheet, PDF (29/300 Pages) Freescale Semiconductor, Inc – 8-BIT HCS08 Central Processor Unit

Chapter 2 External Signal Description
Table 2-1. Pin Sharing Priority
Pin Number _Lowest
Priority
Highest
16-pin 8-pin Port Pin
Alt 1
Alt 2
Alt 3
Alt 4
1
1 PTA5¹
IRQ
TCLK
RESET
2
2 PTA4
ACMPO BKGD
MS
3
3
4
4
5
— PTB7
6
— PTB6
SCL²
SDA²
V_DD
V_SS
EXTAL
XTAL
7
— PTB5
TPMCH1 SS
8
— PTB4
MISO
9
— PTB3
KBIP7
MOSI
ADP7
10
— PTB2
KBIP6
SPSCK ADP6
11
— PTB1
KBIP5
TxD
ADP5
12
— PTB0
13
5 PTA3
14
6 PTA2
15
7 PTA1
16
8 PTA0
KBIP4
KBIP3
KBIP2
KBIP1
KBIP0
RxD
SCL²
SDA²
TPMCH0
ADP4
ADP3
ADP2
ADP1³
ADP0³
ACMP–³
ACMP+³
1 _{Pin does not contain a clamp diode to VDD and should not be driven above VDD.}
The voltage measured on the internally pulled up RESET in will not be pulled
to V_DD. The internal gates connected to this pin are pulled to V_DD.
2 _{IIC pins can be repositioned using IICPS in SOPT2, default reset locations are}
on PTA2 and PTA3.
3 _{If ACMP and ADC are both enabled, both will have access to the pin.}
Table 2-2. Pin Function Reference
Signal Function
Port Pins
Analog comparator
Serial peripheral interface
Keyboard interrupts
Timer/PWM
Inter-integrated circuit
Serial communications interface
Oscillator/clocking
Analog-to-digital
Power/core
Reset and interrupts
Example(s)
PTAx, PTBx
ACMPO, ACMP–, ACMP+
SS, MISO, MOSI, SPSCK
KBIPx
TCLK, TPMCHx
SCL, SDA
TxD, RxD
EXTAL, XTAL
ADPx
BKGD/MS, V_DD, V_SS
RESET, IRQ
Reference
Chapter 6, “Parallel Input/Output Control”
Chapter 8, “Analog Comparator (S08ACMPV2)”
Chapter 15, “Serial Peripheral Interface (S08SPIV3)
Chapter 12, “Keyboard Interrupt (S08KBIV2)”
Chapter 16, “Timer/Pulse-Width Modulator (S08TPMV2)”
Chapter 11, “Inter-Integrated Circuit (S08IICV1)”
Chapter 14, “Serial Communications Interface (S08SCIV3)
Chapter 10, “Internal Clock Source (S08ICSV1)”
Chapter 9, “Analog-to-Digital Converter (S08ADC10V1)”
Chapter 2, “External Signal Description”
Chapter 5, “Resets, Interrupts, and General System Control”
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 1.01
Freescale Semiconductor
29