LC72346W Datasheet, PDF (1/12 Pages) Sanyo Semicon Device – Ultralow-Voltage ETR Controller with On-Chip LCD Driver

Ordering number : ENN*6651
Preliminary
CMOS IC
LC72346W, 72347W
Ultralow-Voltage ETR Controller
with On-Chip LCD Driver
Overview
The LC72346W and LC72347W are ultralow-voltage
electronic tuning microcontrollers that include a PLL that
operates up to 250 MHz and a 1/4 duty 1/2 bias LCD
driver on chip. This IC includes an on-chip DC-DC
converter that can easily create the power supply voltages
needed for electronic tuning and contribute to reducing
end product costs. This IC is optimal for portable audio
equipment that must operate from a single battery.
Function
• Program memory (ROM):
— 4096 × 16 bits (8K bytes) : LC72346
— 6144 × 16 bits (12K bytes): LC72347
• Data memory (RAM):
— 256 × 4 bits: LC72346
— 512 × 4 bits: LC72347
• Cycle time:
40 µs (all 1-word instructions) at 75kHz crystal oscillation
• Stack: 8 levels
• LCD driver: 48 to 80 segments (1/4 duty, 1/2 bias drive)
• Interrupts: Two external interrupts
Timer interrupts (1, 5, 10, and 50 ms)
• A/D converter:
Four input channels (6-bit successive approximation
conversion)
• Input ports: 7 ports (of which three can be switched for
use as A/D converter inputs)
• Output ports: 6 ports (of which 1 can be switched for use
as the beep tone output and 2 are open-drain ports)
• I/O ports: 20 ports (of which 8 can be switched for use
as LCD ports and as mask options, of which 3 can be
switched for use as serial I/O ports)
• Serial I/O: One system (LC72347)
• PLL: Reference frequencies:
1, 3, 3.125, 5, 6.25, 12.5, and 25 kHz
• Input frequencies: FM band: 10 to 250 MHz
AM band (high): 2 to 20 MHz
AM band (low): 0.5 to 10 MHz
• Input sensitivity:
FM band: 35 mVrms (50 mVrms at 130 MHz or higher
frequency)
AM band (high, low): 35 mVrms
• External reset input: During CPU and PLL operations,
instruction execution is started from location 0.
• Built-in power-on reset circuit:
The CPU starts execution from location 0 when power is
first applied.
• Halt mode: The controller-operating clock is stopped.
Continued on next page.
Package Dimensions
unit: mm
3190-SQFP64
[LC72346W, 72347W]
12.0
10.0
1.25
0.5 0.18
48
49
1.25
0.15
33
32
64
1
17
16
0.5 0.5
SANYO: SQFP64
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
N1501TN (OT) No. 6651-1/12