Harman Kardon AVR125 Service Manual page 45

AVR125
LQFP QFP Pin Name
68 70
69 71
70 72
WRLX
71 73
WRHX
72 74
73 75
HAKX
74 76
76 78
P60 to P63
36 to 39 38 to 41
AN0 to
P64 to P67
41 to 44 43 to 46 AN4 to
25 27
Circuit Type
General-purpose I/O port
P50
D In the external bus mode, the pin functions as ALE pin.
(CMOS)
In the external bus mode, the pin functions as an address capture
ALE
enable signal (ALE) pin.
General-purpose I/O port
P51
In the external bus mode, the pin functions as the RDX pin.
D
(CMOS) When the external bus mode is enabled, the pin functions as the read
RDX
strobe output (RDX) pin.
General-purpose I/O port
P52 When the external bus mode is enabled and the WRE bit of the EPCR
register is 1, the pin functions as the WRLX pin
D
(CMOS) When the external bus mode is enabled, the pin functions as the lower-
order side data write strobe output (WRLX) pin. When the WRE bit of
the EPCR register is 0, the pin functions as a general-purpose I/O port.
General-purpose I/O port
When the external bus mode is enabled (the bus is 16-bits long) and
P53
the WRE bit of the EPCR register is 1, the pin functions as the WRHX
D pin.
(CMOS)
When the external bus mode is enabled (the bus is 16-bits long), the
pin functions as the higher-order side data write strobe output (WRHX)
pin. When the WRE bit of the EPCR register is 0, the pin functions as
a general-purpose I/O port.
General-purpose I/O port
P54 When the external bus mode is enabled and the HDE bit of the EPCR
register is 1, the pin functions as the HRQ pin.
D
(CMOS) When the external bus mode is enabled, the pin functions as the hold
HRQ request input (HRQ) pin. When the HDE bit of the EPCR register is 0,
the pin functions as a general-purpose I/O port.
General-purpose I/O port
P55
When the external bus mode is enabled and the HDE bit of the EPCR
register is 1, the pin functions as the HAKX pin.
D
(CMOS)
When the external bus mode is enabled, the pin functions as the hold
acknowledge output (HAKX) pin.
register is 0, the pin functions as a general-purpose I/O port.
General-purpose I/O port When the external bus mode is enabled and
P56
the RYE bit of the EPCR register is 1, the pin functions as the RDY pin.
D
When the external bus mode is enabled, the pin functions as the
(CMOS)
RDY
external ready input (RDY) pin.
register is 0, the pin functions as a general-purpose I/O port.
General-purpose I/O port When the external bus mode is enabled and
P57
the CKE bit of the EPCR register is 1, the pin functions as the CLK pin.
D
When the external bus mode is enabled, the pin functions as the
(CMOS)
CLK machine cycle clock output (CLK) pin. When the CKE bit of the EPCR
register is 0, the pin functions as a general-purpose I/O port.
General-purpose I/O port
H
(CMOS) The pins function as analog input pins.
AN3
General-purpose I/O port
H
(CMOS)
The pins function as analog input pins.
AN7
P70 G General-purpose I/O port
(CMOS/H)
SIN0 The pin functions as an UART data input pin.
Function
When the HDE bit of the EPCR
When the RYE bit of the EPCR
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