LC72E32 Просмотр технического описания (PDF) - SANYO -> Panasonic
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LC72E32 Datasheet PDF : 15 Pages
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LC72E32
Continued from preceding page.
Pin
HCTR
LCTR
Pin No.
Function
Universal counter input
The input should be capacitor-coupled.
70
The input frequency range is from 0.4 to 12 MHz.
This input can be effectively used for FM IF or AM IF
counting.
Universal counter input
The input should be capacitor-coupled for input frequencies in
the range 100 to 150 kHz.
71
Capacitor coupling is not required for input frequencies from
1 to 20 Hz.
This input can be effectively used for AM IF counting.
I/O
Input
A/D converter input
ADI
69
A 1.28 ms period is required for a 6-bit sequential comparison
Input
conversion. The full scale input is ((63/96) · VDD) for a data
value of 3FH.
INT
EO1
EO2
Interrupt request input
66
An interrupt is generated when the INTEN flag is set (by an
SS instruction) and a falling edge is input.
Input
Reference frequency and programmable divisor phase
77
comparison error outputs
78
Charge pump circuits are built in.
EO1 and EO2 are the same.
Output
Input pin used to determine if a power outage has occurred in
SNS
72
BACKUP mode
Input
This pin can also be used as a normal input port.
HOLD
RES
Input pin used to force the LC72E32 to HOLD mode
The LC72E32 goes to HOLD mode when the HOLDEN flag is
67
set (by an SS instruction) and the H O L D input goes low.
Input
A high breakdown voltage circuit is used so that this input can
be used in conjunction with the normal power switch.
System reset input
This signal should be held low for 75 ms after power is first
68
applied to effect a power-up reset.
The reset starts when a low level has been input for at least
six reference clock cycles.
Input
XIN
XOUT
Crystal oscillator connections
1
(4.5 MHz)
80
A feedback resistor is built in.
Input
Output
TEST1
TEST2
79
LSI test pins. These pins must be connected to VSS.
2
VDD
31, 73 Power supply + connections. Both pins must be connected.
VSS
76
Power supply – connection.
I/O circuit type
EPROM mode
function
EPROM write
power
Vpp
No. 4741-7/15
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