mc9s08qa4 Freescale Semiconductor, Inc, mc9s08qa4 Datasheet - Page 3

• Manufacturer Part Number: mc9s08qa4
• Description: Mc9s08qa4 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

1
The block diagram,
2
This section shows the pin assignments in the packages available for the MC9S08QA4 series.
Freescale Semiconductor
V
V
NOTES:
1
2
3
4
5
6
7
SS
DD
Port pins are software configurable with pullup device if input port.
Port pins are software configurable for output drive strength.
Port pins are software configurable for output slew rate control.
IRQ contains a software configurable (IRQPDD) pullup device if PTA5 enabled as IRQ pin function (IRQPE = 1).
RESET contains integrated pullup device if PTA5 enabled as reset pin function (RSTPE = 1).
PTA4 contains integrated pullup device if BKGD enabled (BKGDPE = 1).
When pin functions as KBI (KBIPEn = 1) and associated pin is configured to enable the pullup device, KBEDGn can
be used to reconfigure the pullup as a pulldown device.
MCU Block Diagram
(MC9S08QA2 = 2048 BYTES)
Pin Assignments
(MC9S08QA4 = 4096 BYTES)
(MC9S08QA4 = 256 BYTES)
(MC9S08QA2 = 160BYTES)
HCS08 SYSTEM CONTROL
RESETS AND INTERRUPTS
16 MHz INTERNAL CLOCK
MODES OF OPERATION
VOLTAGE REGULATOR
POWER MANAGEMENT
CPU
IRQ
RTI
SOURCE (ICS)
HCS08 CORE
USER FLASH
USER RAM
V
V
V
V
Figure
DDA
SSA
REFH
REFL
BDC
1, shows the structure of the MC9S08QA4 MCU.
COP
LVD
Figure 1. MC9S08QA4 Series Block Diagram
MC9S08QA4 Series, Rev. 2
INTERRUPT MODULE (KBI)
ANALOG COMPARATOR
DEBUG MODULE (DBG)
8-BIT MODULO TIMER
ANALOG-TO-DIGITAL
CONVERTER (ADC)
16-BIT TIMER/PWM
8-BIT KEYBOARD
MODULE (MTIM)
MODULE (TPM)
(ACMP)
10-BIT
ACMPO
ACMP–
ACMP+
TPMCH0
4
4
BKGD/MS
IRQ
TCLK
PTA5//IRQ/TCLK/RESET
PTA4/ACMPO/BKGD/MS
PTA3/KBIP3/ADP3
PTA2/KBIP2/ADP2
PTA1/KBIP1/ADP1/ACMP–
PTA0/KBIP0/TPMCH0/ADP0/ACMP+
MCU Block Diagram
3