upd75212a Renesas Electronics Corporation., upd75212a Datasheet - Page 52

• Manufacturer Part Number: upd75212a
• Description: 4-bit Single-chip Microcomputer
• Manufacturer: Renesas Electronics Corporation.

52
Remarks
* 1. The following external circuit is recommended.
POWER-ON RESET CIRCUIT CHARACTERISTICS (MASK OPTION) (Ta = –40 to +85 C)
* 1. 2
Power-on reset
operating voltage high
Power-on reset
operating voltage low
Power supply voltage
rise time
Power supply voltage
off time
Power-on reset circuit*2
current consumption
2. Current to the on-chip pull-down resistor and power-on reset circuit (mask option) is not included.
3. When the processor clock control register (PCC) is set to 0011 and is operated in the high-speed mode.
4. When the PCC register is set to 0000 and is operated in the low-speed mode.
5. When the system clock control register (SCC) is set to 1001 and is operated with the subsystem clock with
2. Current with on-chip power-on reset circuit or power-on flag.
PARAMETER
main system clock oscillation stopped.
17
/f
XX
Start the power supply smoothly.
(31.3 ms at f
V
DD
PD75212A
V
V
LOAD
XX
V
V
PRE
DD
SS
SYMBOL
= 4.19 MHz)
V
V
I
DDPR
t
DDH
DDL
t
off
r
V
V
DD
DD
= 5 V 10 %
= 2.7 V
RD9, 1EL
68 k
TEST CONDITIONS
RD9, 1EL :Zener Diode (NEC)
t
off
+5 V
–30 V
Zener Voltage = 8.29 to 9.30 V
t
r
V
DDL
V
DDH
MIN.
4.5
10
0
1
TYP.
10
2
PD75212A
MAX.
100
6.0
0.2
*1
20
UNIT
V
V
s
A
A
s