MC68HC908BD48 Datasheet, PDF (117/290 Pages) Freescale Semiconductor, Inc – Microcontrollers

Monitor ROM (MON)
Functional Description
V_DD
10 kΩ
0.1 µF
68HC908
RST
V_TST
10 Ω
IRQ
1
+
10 µF
3
4
10 µF
+2
DB-25
2
5
3
6
MC145407
20
+
10 µF
18
17
10 µF ^{VDD 20 pF}
19 ⁺
16
15
X1
9.83 MHz
20 pF
7
NOTES:
Position A — Bus clock = OSCXCLK ÷ 4
Position B — Bus clock = OSCXCLK ÷ 2
V_DD
1
14
MC74HC125
2
3
6
5
4
V_DD
7
10 kΩ
A
(See
NOTES) ^B
10 MΩ
V_DD
0.1 µF
V_DD
10 kΩ
V_DD
10 kΩ
Figure 9-1. Monitor Mode Circuit
OSC1
OSC2
V_SS
V_SS1
V_DD
PTA0
PTC3
PTC0
PTC1
MC68HC908BD48 — Rev. 1.0
MOTOROLA
Monitor ROM (MON)
Technical Data
117