NXP Semiconductors MC9S08QL4, Reference Manual

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Chapter 1 Device Overview
MC9S08QL8 MCU Series Reference Manual, Rev. 1
14 NXP Semiconductors
1.2 MCU Block Diagram
The block diagram in Figure 1-1 shows the structure of the MC9S08QL8 series MCU.
Figure 1-1. MC9S08QL8 Series Block Diagram
USER FLASH
USER RAM
HCS08 CORE
CPU
BDC
16-BIT TIMER/PWM
MODULE (TPM)
PTB7/EXTAL
PO
R
T
B
HCS08 SYSTEM CONTROL
RESETS AND INTERRUPTS
MODES OF OPERATION
POWER MANAGEMENT
COP LVD
8-BIT MODULO TIMER
MODULE (MTIM)
PTB6/XTAL
PTB5/TPMCH0
PTB4
PTB3/KBIP7/ADP7
PTB2/KBIP6/ADP6
VOLTAGE REGULATOR
POR
T
A
PTA1/KBIP1/ADP1/ACMP–
ANALOG COMPARATOR
(ACMP)
LOW-POWER OSCILLATOR
20 MHz INTERNAL CLOCK
SOURCE (ICS)
31.25 kHz to 38.4 kHz
1 MHz to 16 MHz
(XOSC)
V
SS
V
DD
ANALOG-TO-DIGITAL
CONVERTER (ADC)
12-BIT
PTB1/KBIP5/TxD/ADP5
PTB0/KBIP4/RxD/ADP4
POR
T
C
REAL-TIME COUNTER
(MC9S08QL8 = 8192 BYTES)
(MC9S08QL4 = 4096 BYTES)
(MC9S08QL8 = 512 BYTES)
(MC9S08QL4 = 256 BYTES)
PTA3/KBIP3/ADP3
PTA2/KBIP2/ADP2
PTA0/KBIP0/TPMCH0/ADP0/ACMP
PTA4/ACMPO/BKGD/MS
PTA5/IRQ/TCLK/RESET
IRQ
pins not available on 16-pin package
(RTC)
PTC3
PTC2
PTC1
PTC0
V
REFL
/V
SSA
V
REFH
/V
DDA
SERIAL COMMUNICATIONS
INTERFACE MODULE (SCI)
KEYBOARD INTERRUPT
(KBI)
1
V
DDA
/V
REFH
and V
SSA
/V
REFL
are double bonded to V
DD
and V
SS