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CHAPTER 1 OUTLINE
User’s Manual U16315EJ3V1UD
18
1.2 Features
Minimum instruction execution time can be changed from high speed (0.166
s: @ 12 MHz operation with X1
input clock) to ultra low-speed (122
s: @ 32.768 kHz operation with subsystem clock)
General-purpose register: 8 bits
× 32 registers (8 bits × 8 registers × 4 banks)
ROM, RAM capacities
Data Memory
Item
Part Number
Program Memory
(ROM)
Internal High-Speed RAM
PD780121
8 KB
PD780122
16 KB
512 bytes
PD780123
24 KB
PD780124
Mask ROM
32 KB
1024 bytes
PD78F0124
Flash memory
32 KB
Note
1024 bytes
Note
The internal flash memory and internal high-speed RAM capacities can be changed using the internal
memory size switching register (IMS).
On-chip power-on-clear (POC) circuit and low-voltage detector (LVI)
Short startup is possible via the CPU default start using the internal oscillator
On-chip clock monitor function using internal oscillator
On-chip watchdog timer (operable with internal oscillation clock)
On-chip key interrupt function
On-chip clock output controller
On-chip regulator
I/O ports: 39 (N-ch open drain: 4)
Timer: 7 channels
Serial interface: 2 channels
(UART (LIN (Local Interconnect Network)-bus supported): 1 channel, CSI/UART
Note 1: 1 channel)
10-bit resolution A/D converter: 8 channels
Supply voltage: VDD = 2.5 to 5.5 V
Notes 2, 3 (expanded-specification products of standard products and (A) grade
products)
VDD = 2.7 to 5.5 V
Notes 2, 3 (conventional products of standard products and (A) grade products)
VDD = 3.3 to 5.5 V
Note 3 ((A1) grade products, (A2) grade products)
Operating ambient temperature: TA =
40 to +85°C (standard product, (A) grade product)
TA =
40 to +105°C (flash memory version of (A1) grade product)
TA =
40 to +110°C (mask ROM version of (A1) grade product)
TA =
40 to +125°C (mask ROM version of (A2) grade product)
Notes 1.
Select either of the functions of these alternate-function pins.
2.
Use the product in a voltage range of 3.0 to 5.5 V when the detection voltage (VPOC) of the power-on-
clear (POC) circuit is 2.85 V
±0.15 V.
3.
Use the product in a voltage range of 3.7 to 5.5 V when the detection voltage (VPOC) of the power-on-
clear (POC) circuit is 3.5 V
±0.2 V.