MC68HC08JK1 Datasheet, PDF (97/198 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Monitor ROM (MON)
Functional Description
V_DD + V_HI
(SEE NOTE 2)
10k Ω
0.1 µF
V_DD
9.8304 MHz
V_DD
0.1 µF
1
+
10 µF
3
4
10 µF
+2
DB-25
2
5
3
6
7
MC145407
20
+
10 µF
18
(SEE NOTE 3) _C
9.8304 MHz
D
20 pF
C
SW2
17
10 µF ^VDD
19 ⁺
X-TAL CIRCUIT
D
20 pF
V_DD
10 kΩ
A
SW1
16
(SEE NOTE 1)
B
15
10 kΩ
V_DD
1
14
V_DD
MC74HC125
2
3
10 kΩ
6
5
4
V_DD
10 kΩ
7
NOTES:
1. SW1: Position A — Bus clock = OSC1 clock ÷ 4
SW1: Position B — Bus clock = OSC1 clock ÷ 2
2. See Table 18-4 for IRQ1 voltage level requirements.
3. SW2: Position C— External oscillator clock input
SW2: Position D— Crystal oscillator clock input
External oscillator must have a 50% duty cycle
10 kΩ
RST
H(R)C08JL3
H(R)C08JK3
H(R)C08JK1
IRQ1
V_DD
V_SS
OSC1
OSC2
PTB3
PTB0
PTB1
PTB2
Figure 9-1. Monitor Mode Circuit
MC68H(R)C08JL3 — Rev. 4
MOTOROLA
Monitor ROM (MON)
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Technical Data
97