LC866548 Datasheet, PDF (2/21 Pages) Sanyo Semicon Device – 8-Bit Single Chip Microcontroller

(2) Random Access Memory (RAM)
LC866548/40/32/28/24A
: LC866548A/40A/32A
LC866528A/24A
1152 × 8 bits
896 × 8 bits
(3) Bus Cycle Time / Instruction Cycle Time
The bus cycle time indicates the speed to read ROM.
Bus cycle time Cycle time Clock divider System clock oscillation Oscillation Frequency Voltage
0.5µs
1µs
1/1
Ceramic resonator oscillation
6MHz
4.5 - 6.0V
2µs
4µs
1/2
Ceramic resonator oscillation
3MHz
4.5 - 6.0V
7.5µs
15µs
1/2
RC resonator oscillation
800MHz
4.5 - 6.0V
183µs
366µs
1/2
Crystal oscillation
32.768kHZ
4.5 - 6.0V
Note : External resisters (Rf, Rd) are required when X’tal oscillation is used.
(4) Ports
- Input/output ports
: 3 ports (16 terminals : port 1, 7, 8)
Input/output port programmable in a bit
- 15V withstand Input/output ports
: 2 ports (16 terminals)
Input/output port programmable nibble unit
: 1 port (8 terminals : port 0)
(When the N-channel open drain output is selected, the data in a bit can be inputted.)
Input/output port programmable in a bit
: 1 port (8 terminals : port 3)
- Input port
: 2 ports (6 terminals : port 7, 8)
- VFD output port
: 52 terminals
Large current output for digit
: 16 terminals
Pull-down resistor option available
- Other function
Input/output port
: 2 ports (12 terminals : port F, G)
Input port
: 3 ports (24 terminals : port C, D, E)
(5) VFD automatic display controller
- Segment/digit output pattern programmable
Any segment/digit combination available
VFD parallel-drive available
- 16-step dimmer function available
(6) AD converter
- 8-channels × 8-bit AD converter
(7) Serial interface
- 1-channel × 16-bit serial interface circuits
- 1-channel × 8-bit serial interface circuits
- LSB first/MSB first function available
- Internal 8-bit baud-rate generator in common with two serial interface circuits
- SIO automatic transmission available (2-32 byte data can be transmitted with program automatically and
continuously.)
No.6700-2/21