Harman Kardon AVR 235, Service Manual

Page: 93 / 122

MB9048 2
(Continued)
Pin No.
Pin name
Circuit
type
Function
LQFP*
1
QFP*
2
74 76
P56
D
(CMOS)
This is a general purpose I/O port. In external bus mode, when
the RYE bit in the EPCR register is set to “1”, this pin functions
as the RDY pin.
RDY
In external bus mode, this pin functions as the external ready
(RDY) input pin. When the RYE bit in the EPCR register is set to
“0”, this pin functions as a general purpose I/O port.
76 78
P57
D
(CMOS)
This is a general purpose I/O port. In external bus mode, when
the CKE bit in the EPCR register is set to “1”, this pin functions
as the CLK pin.
CLK
In external bus mode, this pin functions as the machine cycle
clock (CLK) output pin. When the CKE bit in the EPCR register is
set to “0”, this pin functions as a general purpose I/O port.
36 to 39 38 to 41
P60 to P63
H
(CMOS)
These are general purpose I/O ports.
AN0 to AN3 These are the analog input pins.
41 to 44 43 to 46
P64 to P67
H
(CMOS)
These are general purpose I/O ports.
AN4 to AN7 These are the analog input pins.
25 27
P70
G
(CMOS/H)
This is a general purpose I/O port.
SIN0 This is the UART data input pin.
26 28
P71
F
(CMOS)
This is a general purpose I/O port.
SOT0 This is the UART data output pin.
27 29
P72
G
(CMOS/H)
This is a general purpose I/O port.
SCK0 This is the UART clock I/O pin.
28 30
P73
G
(CMOS/H)
This is a general purpose I/O port.
TIN0 This is the 16-bit reload timer event input pin.
29 31
P74
F
(CMOS)
This is a general purpose I/O port.
TOT0 This is the 16-bit reload timer output pin.
30 32 P75
F* 4
(CMOS)
This is a general purpose I/O port.
31 33 P76
F*
5
(CMOS)
This is a general purpose I/O port.
32 34 P77
F* 5
(CMOS)
This is a general purpose I/O port.
45,
46
47,
48
P80, P81
E
(CMOS/H)
These are general purpose I/O ports.
IRQ0, IRQ1 External interrupt input pins.
50 to 55 52 to 57
P82 to P87
E
(CMOS/H)
These are general purpose I/O ports.
IRQ2 to IRQ7 External interrupt input pins.
AVR235 harman/kardon
93