UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 696

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

31.1 Cautions for Wait
may be passed if an access to the CPU conflicts with an access to the peripheral hardware.
processing, until the correct data is passed.
execution clocks of an instruction increases by the number of wait clocks (for the number of wait clocks, see Table 31-
1). This must be noted when real-time processing is performed.
696
This product has two internal system buses.
One is a CPU bus and the other is a peripheral bus that interfaces with the low-speed peripheral hardware.
Because the clock of the CPU bus and the clock of the peripheral bus are asynchronous, unexpected illegal data
When accessing the peripheral hardware that may cause a conflict, therefore, the CPU repeatedly executes
As a result, the CPU does not start the next instruction processing but waits. If this happens, the number of
CHAPTER 31 CAUTIONS FOR WAIT
User’s Manual U17554EJ4V0UD