MC68HC908JL8CP Freescale Semiconductor, MC68HC908JL8CP Datasheet - Page 86

• Manufacturer Part Number: MC68HC908JL8CP
• Description: IC MCU 8K FLASH 8MHZ 28-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JL8CP

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 23
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 13x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Monitor ROM (MON)
86
NOTES:
1. Monitor mode entry method:
2. Affects high voltage entry to monitor mode only (SW1 at position A):
5. See
1 µF
1 µF
2
3
5
DB9
SW1: Position A — High voltage entry (V
SW1: Position B — Reset vector must be blank ($FFFE = $FFFF = $FF)
SW2: Position C — Bus clock = OSC1 ÷ 4
SW2: Position D — Bus clock = OSC1 ÷ 2
Table 17-4
+
+
7
8
1
3
4
5
C1+
C1–
C2+
C2–
for V
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
MAX232
TST
Bus clock depends on SW2.
Bus clock = OSC1 ÷ 4.
voltage level requirements.
GND
V
V+
V–
CC
16
15
2
10
6
9
V
DD
+
+
Figure 7-1. Monitor Mode Circuit
1 µF
TST
1 µF
2
)
74HC125
1
+
3
EXT OSC CONNECTION TO OSC1, WITH OSC2
UNCONNECTED, CAN REPLACE XTAL CIRCUIT.
1 µF
74HC125
6
V
TST
4
V
DD
5
V
EXT OSC (50% DUTY)
DD
XTAL CIRCUIT
10 k
20 pF
1 k
9.8304MHz
(SEE NOTE 2)
8.5 V
10 k
10 k
20 pF
A
B
C
D
OSC1
V
DD
10 k
SW1
SW2
0.1 µF
(SEE NOTE 1)
V
DD
Freescale Semiconductor
10 k
0.1 µF
V
10 k
DD
V
DD
RST
HC908JL8
V
V
OSC1
OSC2
IRQ
PTB0
PTB1
PTB3
PTB2
DD
SS