Introduction
1.3
MCU Block Diagram
This block diagram shows the structure of the MC9S08RC/RD/RE/RG MCUs
INTERNAL BUS
HCS08 CORE
7
PTA7/KBI1P7–
PTA1/KBI1P1
NOTES1, 2, 6
DEBUG
MODULE (DBG)
BDC
CPU
PTA0/KBI1P0
HCS08 SYSTEM CONTROL
PTB7/TPM1CH1
8-BIT KEYBOARD
PTE6
PTB5
PTB4
PTB3
INTERRUPT MODULE (KBI1)
RESETS AND INTERRUPTS
MODES OF OPERATION
POWER MANAGEMENT
NOTES 1, 5
4-BIT KEYBOARD
PTB2
PTB1/RxD1
PTB0/TxD1
INTERRUPT MODULE (KBI2)
RTI
COP
LVD
IRQ
SERIAL COMMUNICATIONS
INTERFACE MODULE (SCI1)
PTC7/SS1
PTC6/SPSCK1
PTC5/MISO1
PTC4/MOSI1
PTC3/KBI2P3
PTC2/KBI2P2
PTC1/KBI2P1
PTC0/KBI2P0
USER FLASH
NOTE 1
(RC/RD/RE/RG60 = 63,364 BYTES)
(RC/RD/RE/RG32 = 32,768 BYTES)
(RC/RD/RE16 = 16,384 BYTES)
(RC/RD/RE8 = 8192 BYTES)
ANALOG COMPARATOR
MODULE (ACMP1)
2-CHANNEL TIMER/PWM
MODULE (TPM1)
PTD6/TPM1CH0
PTD5/ACMP1+
PTD4/ACMP1–
PTD3
USER RAM
(RC/RD/RE/RG32/60 = 2048 BYTES)
(RC/RD/RE8/16 = 1024 BYTES)
NOTES
1, 3, 4
PTD2/IRQ
PTD1/RESET
PTD0/BKGD/MS
SERIAL PERIPHERAL
EXTAL
XTAL
INTERFACE MODULE (SPI1)
LOW-POWER OSCILLATOR
8
PTE7–PTE0 NOTE 1
VDD
VOLTAGE
REGULATOR
VSS
CARRIER MODULATOR
TIMER MODULE (CMT)
IRO NOTE 5
NOTES:
1. Port pins are software configurable with pullup device if input port
2. PTA0 does not have a clamp diode to VDD. PTA0 should not be driven above VDD. Also, PTA0 does not pullup to
DD when internal pullup is enabled.
V
3. IRQ pin contains software configurable pullup/pulldown device if IRQ enabled (IRQPE = 1)
4. The RESET pin contains integrated pullup device enabled if reset enabled (RSTPE = 1)
5. High current drive
6. Pins PTA[7:4] contain both pullup and pulldown devices. Pulldown enabled when KBI is enabled (KBIPEn = 1) and
rising edge is selected (KBEDGn = 1).
Figure 1-1. MC9S08RC/RD/RE/RG Block Diagram
Table 1-2 lists the functional versions of the on-chip modules.
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
Freescale Semiconductor
17
FREESCALE [ Freescale ]
