NEC PD750008 - Manual (Page 22)

2
µPD750008 USER'S MANUAL
1.1 FUNCTION OVERVIEW
Item Function
Instruction execution • 0.95, 1.91, 3.81, 15.3 µs (when the main system clock operates at 4.19 MHz)
time • 0.67, 1.33, 2.67, 10.7 µs (when the main system clock operates at 6.0 MHz)
• 122 µs (when the subsystem clock operates at 32.768 kHz)
Internal memory ROM 4096 x 8 bits (µPD750004)
6144 x 8 bits (µPD750006)
8192 x 8 bits (µPD750008)
16384 x 8 bits (µPD75P0016)
RAM 512 x 4 bits
General register • When operating in 4 bits: 8 x 4 banks
• When operating in 8 bits: 4 x 4 banks
I/O port 34 8 CMOS input pins Can incorporate 25 pull-up resistors
18 CMOS I/O pins
that are specified with the software.
Four pins can directly drive
the LED.
8 N-ch open-drain I/O pins Can withstand 13 V.
Eight pins can directly drive Can incorporate pull-up resistors that
the LED. are specified with the mask option.
Note
Timer 4 • Timer/event counter: 1 channel
• Timer counter: 1 channel
• Basic interval timer/watchdog timer: 1 channel
• Clock timer: 1 channel
Serial interface • Three-wire serial I/O mode (switchable between the start LSB and the start MSB)
• Two-wire serial I/O mode
• SBI mode
Bit sequential buffer 16 bits
Clock output • F , 524 kHz, 262 kHz, 65.5 kHz (when the main system clock operates at 4.19 MHz)
• F , 750 kHz, 375 kHz, 93.7 kHz (when the main system clock operates at 6.0 MHz)
Vectored interrupt External: 3, Internal: 4
Test input External: 1, Internal: 1
System clock oscillator • Ceramic or crystal oscillator for the main system clock
• Crystal oscillator for the subsystem clock
Standby function STOP/HALT mode
Operating ambient T
A
= –40°C to +85°C
temperature
Supply voltage V
DD
= 2.2 to 5.5 V
Package 42-pin plastic shrink DIP (600 mil)
44-pin plastic QFP (10 x 10 mm)
Note The N-ch open-drain I/O port pins of the µPD75P0016 are not connected to pull-up resistors by mask
option, and are always open.
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