LC877424A Datasheet, PDF (4/22 Pages) Sanyo Semicon Device – 8 Bit Single Chip Microcontroller Incorporating 48K/40K/32K/24K Byte ROM and 1536 byte RAM on Chip

LC877448A/40A/32A/24A
(17) Oscillation circuits
• On-chip RC oscillation for system clock use.
• CF oscillation for system clock use. (Rf built in, Rd external)
• Crystal oscillation low speed system clock use. (Rf built in, Rd external)
• On-chip frequency variable RC oscillation circuit for system clock use.
(18) System clock divider
• Low power consumption operation is available
• Minimum instruction cycle time (300ns, 600ns, 1.2µs, 2.4µs, 4.8µs, 9.6µs, 19.2µs, 38.4µs, 76.8µs can be
switched by program (when using 10MHz main clock)
(19) Standby function
• HALT mode
HALT mode is used to reduce power consumption. During the HALT mode, program execution is stopped but
peripheral circuits keep operating (some parts of serial transfer operation stop.)
1) Oscillation circuits are not stopped automatically.
2) Released by the system reset or interrupts.
• HOLD mode
HOLD mode is used to reduce power consumption. Program execution and peripheral circuits are stopped.
1) CF, RC and crystal oscillation circuits stop automatically.
2) Released by any of the following conditions.
(1) Low level input to the reset pin
(2) Specified level input to one of INT0, INT1, INT2, INT4, INT5
(3) Port 0 interrupt
• X’tal HOLD mode
X’tal HOLD mode is used to reduce power consumption. Program execution is stopped.
All peripheral circuits except the base timer are stopped.
1) CF and RC oscillation circuits stop automatically.
2) Crystal oscillator operation is kept in its state at HOLD mode inception.
3) Released by any of the following conditions
(1) Low level input to the reset pin
(2) Specified level input to one of INT0, INT1, INT2, INT4, INT5
(3) Port 0 interrupt
(4) Base-timer interrupt
(20) Package
• QIP100E
• TQFP100
(21) Development tools
• Evaluation chip: LC876093
• Emulator: EVA62S + ECB876600 (Evaluation chip board) + SUB877400 + POD100QFP or
POD100SQFP (Type B)
: ICE-B877300 + SUB877400 + POD100QFP or POD100SQFP (Type B)
• Flash ROM version: LC87F74C8A
No.7776-4/22