Motorola MC6805R Series User Manual

--
~
RESET
+
1.
-
1
40
r
1.0--
VSS
PA7
39
JLFT
2 RESET
PA6
3 INT
PA5
~
4 VCC
PA4
.R.
..
36
...l.. 1.0 JLF
PA3
.25V
5
:c -L~
*~
EXTAL
PA2
35
- It=::;
4.00E-2
PAl
34
XTAL
-
MHz 7
PAO
33
10 k
~
NUM (N/C)**
_ ...
AAA
TIMER
LED Y; Y 5100
10V
..... If A A
9 PCO
PB7
32
LED ..... ~ .... ~1l>sr ......
10 PCl
PB6
31
~ED""'/;A~l~O
11 PC2
PB5
~
LED ..... ~r' ~122"'''' ...
12 PC3
PB4
~
-.
.........
+5
...n
PC4
PB3
28
----.l1
PC5
PB2
27
15 PC6
PBl
~
-
16 PC7
PBO
~
~
P07
.J..§
P06/(INT21
POO
24
19 P05
POl
23
..L
P02
22
O.l
JL
F
T
20 P04
P03
21
.L
-
* This connection depends on clock oscillator user selectable mask option. Use jumper if the RC mask option is selected.
* * For the MC6805R2/MC6805U2 pin 7 is not for user application and must be connected to VSS. For the MC6805R3/MC6805U3 pin 7
is
not connected. .
LED Meanings
PCO PCl
PC2
PC3
Remarks [l:LED ON; O:LED OFF]
1 0
1
a
Bad I/O
0 0 1 0
Bad Timer
1 1
0 0
Bad RAM
0
1
a 0
Bad ROM
1
0
a a
Bad AID
a a
a a
Bad Interrupts or Request Flag
All Flashinq
Good Device
Anything else bad
Part, Bad Port C, etc.
Figure 6-1. Self-Check Connections
6-2

Motorola MC6805R Series Specifications

General

Brand	Motorola
Model	MC6805R Series
Category	Computer Hardware
Language	English