MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 130

• Manufacturer Part Number: MC68HC908LB8CPE
• Description: IC MCU 8K FLASH 8MHZ 20DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908LB8CPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVR, POR, PWM
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 7x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

Oscillator Module (OSC)
13.8 Input/Output (I/O) Registers
The oscillator module contains these two registers:
13.8.1 Oscillator Status Register
The oscillator status register (OSCSTAT) contains the bits for switching from internal to external clock
sources.
ECGON — External Clock Generator On Bit
130
1. Oscillator status register (OSCSTAT)
2. Oscillator trim register (OSCTRIM)
This read/write bit enables external clock generator, so that the switching process can be initiated. This
bit is forced low during reset. This bit is ignored in monitor mode when the internal oscillator is
bypassed.
1 = External clock generator enabled
0 = External clock generator disabled
Address: $0036
Reset:
Read:
Write:
Bit 7
R
R
Figure 13-4. Oscillator Status Register (OSCSTAT)
0
OSCOPT1
= Reserved
0
0
1
1
R
6
0
Table 13-2. Oscillator Modes
MC68HC908LB8 Data Sheet, Rev. 1
OSCOPT0
R
5
0
0
1
0
1
R
4
0
External Oscillator
Oscillator Modes
Internal Oscillator
External Crystal
External RC
R
3
0
R
2
0
ECGON
1
0
Freescale Semiconductor
ECGST
Bit 0
0