CHAPTER 1 GENERAL
User’s Manual U12978EJ3V0UD
27
1.7 Functions
Product
Item
µ
PD789800
µ
PD78F9801
Internal memory ROM Mask ROM
8 KB
Flash memory
16 KB
High-speed RAM 256 bytes
Minimum instruction execution time 0.33
µ
s/1.33
µ
s (at 6.0 MHz operation with system clock)
Instruction set • 16-bit operation
• Bit manipulation (set, reset, and test) etc.
I/O ports CMOS I/O 31
(Of the above COMS I/O ports, 18 ports can be switched to N-ch open-drain
I/O ports.)
Serial interface • USB (Universal Serial Bus) function: 1 channel
• Three-wired serial I/O mode: 1 channel
Timer • 8-bit timer: 1 channel
• 8-bit timer/event counter: 1 channel
• Watchdog timer: 1 channel
Regulator Incorporated (V
REG
= 3.3 ±0.3 V)
Maskable
Internal: 9, external: 2
Vector interrupt
sources
Non-maskable Internal: 1
Power supply voltage V
DD
= 4.0 to 5.5 V
Operating ambient temperature • T
A
= –40 to +85°C (when the USB is not operating)
•T
A
= 0 to +70°C (when the USB is operating)
•T
A
= 10 to 40°C (when a flash memory is written)
Package 44-pin plastic LQFP (10 × 10)
An outline of the timer is shown below.
8-Bit Timer 00 8-Bit Timer/
Event Counter 01
Watchdog Timer
Interval timer 1 channel 1 channel 1 channel
Note
Operation mode
External event counter −
−−
− 1 channel −
−−
−
Timer outputs −
−−
− 1 output −
−−
−
Square-wave outputs −
−−
− 1 output −
−−
−
Capture −
−−
−−
−−
−−
−−
−
Function
Interrupt sources 1 1 2
Note The watchdog timer has watchdog timer and interval timer functions. However, use the watchdog timer by
selecting either the watchdog timer function or interval timer function.
To Next Page
Loading...