Harman Kardon AVR240 Service Manual page 125

AVR240
MB90482
Pin No.
LQFP* 1 QFP* 2
19 21
20 22
22 24
23 25
24 26
OUT4/OUT5
68 70
69 71
70 72
71 73
72 74
73 75
Circuit
Pin name
type
P43, P44
F
(CMOS)
A11, A12
P45
4
F*
(CMOS)
A13
P46, P47
F
A14, A15
(CMOS)
P50
D
(CMOS)
ALE
P51
D
(CMOS)
RD
P52
D
(CMOS)
WRL
P53
D
(CMOS)
WRH
P54
D
(CMOS)
HRQ
P55
D
(CMOS)
HAK
This is a general purpose I/O port.
In non-multiplex mode, this pin functions as an external
address pin.
This is a general purpose I/O port.
In non-multiplex mode, this pin functions as an external
address pin.
This is a general purpose I/O port.
In non-multiplex mode, this pin functions as an external
address pin.
Output compare event output pins.
This is a general purpose I/O port. In external bus mode, this pin
functions as the ALE pin.
In external bus mode, this pin functions as the address load
enable (ALE) signal pin.
This is a general purpose I/O port. In external bus mode, this pin
functions as the RD pin.
In external bus mode, this pin functions as the read strobe output
(RD) signal pin.
This is a general purpose I/O port. In external bus mode, when
the WRE pin in the EPCR register is set to "1", this pin functions
as the WRL pin.
In external bus mode, this pin functions as the lower data write
strobe output (WRL) pin. When the WRE bit in the EPCR regis-
ter is set to "0", this pin functions as a general purpose I/O port.
This is a general purpose I/O port. In external bus mode with
16-bit bus width, when the WRE bit in the EPCR register is set to
"1", this pin functions as the WRH pin.
In external bus mode with 16-bit bus width, this pin functions as
the upper data write strobe output (WRH) pin. When the WRE bit
in the EPCR register is set to "0", this pin functions as a general
purpose I/O port.
This is a general purpose I/O port. In external bus mode, when
the HDE bit in the EPCR register is set to "1", this pin functions
as the HRQ pin.
In external bus mode, this pin functions as the hold request input
(HRQ) pin. When the HDE bit in the EPCR register is set to "0",
this pin functions as a general purpose I/O port.
This is a general purpose I/O port. In external bus mode, when
the HDE bit in the EPCR register is set to "1", this pin functions
as the HAK pin.
In external bus mode, this pin functions as the hold acknowledge
(HAK) pin. When the HDE bit in the EPCR register is set to "0",
this pin functions as a general purpose I/O port.
125
harman/kardon
Function
(Continued)