UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 249

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

15.2 Configuration of Power-on-Clear Circuit
15.3 Operation of Power-on-Clear Circuit
and an internal reset signal is generated when V
POC detection voltage
(V
Internal reset signal
Supply voltage (V
The block diagram of the power-on-clear circuit is shown in Figure 15-1.
In the power-on-clear circuit, the supply voltage (V
POC
= 2.1 V (TYP.))
Figure 15-2. Timing of Internal Reset Signal Generation in Power-on-Clear Circuit
DD
)
V
DD
Figure 15-1. Block Diagram of Power-on-Clear Circuit
Reference
voltage
source
CHAPTER 15 POWER-ON-CLEAR CIRCUIT
User’s Manual U16898EJ5V0UD
DD
+
−
< V
V
DD
DD
POC
) and detection voltage (V
, and an internal reset is released when V
Internal reset signal
POC
= 2.1 V (TYP.)) are compared,
DD
≥ V
POC
.
Time
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