µPD75304B,75306B,75308B
FUNCTION OUTLINE (1/2)
Item
Function
Number of basic instructions
41
0.95 µs, 1.91 µs, 15.3 µs (main system clock: 4.19 MHz operation)
122 µs (subsystem clock: 32.768 kHz operation)
Instruction cycle
ROM
8064 × 8 bits (µPD75308B), 6016× 8 bits (µPD75306B), 4096× 8 bits (µPD75304B)
512 × 4 bits
On-chip memory
RAM
• 4-bit manipulation: 8 (B, C, D, E, H, L, X, A)
• 8-bit manipulation: 4 (BC, DE, HL, XA)
General register
• Bit accumulator (CY)
• 4-bit accumulator (A)
• 8-bit accumulator (XA)
Accumulators
Instruction set
• Various bit manipulation instructions
• Efficient 4-bit data manipulation instructions
• 8-bit data transfer instructions
• GETI instruction that can implement arbitrary 2-byte/3-byte instructions with 1
byte
8
CMOS input
Pull-up by software possible : 23
16
CMOS input/output
40
I/O lines
8
8
CMOS output
Used with segment pin
N-ch open-drain
input/output
10 V withstand voltage, pull-up by mask option
possible : 8
• Number of segments selection: 24/28/32 segments (4/8 can be switched at bit
port output.)
• Display mode selection: Static, 1/2 duty, 1/3 duty (1/2 bias), 1/3 duty (1/3 bias),
1/4 duty
LCD controller/driver
Supply voltage range
• LCD drive division resistor can be incorporated by mask option
VDD = 2.0 to 6.0 V
• 8-bit timer/event counter
• Clock source: 4 stages
• Event count possible
Timer
3 channels
• 8-bit basic interval timer
• Standard clock generation: 1.95 ms, 7.82 ms, 31.3 ms, 250 ms
(4.19 MHz operation)
• Watchdog timer application possible
3
NEC [ NEC ]
