UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 632

• 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

25.3 Connection Circuit Examples
632
The following are examples of circuits required when connecting the QB-78K0MINI to the target system.
Note Make pull-down resistor 470 Ω or more (10 kΩ: recommended).
Note Make pull-down resistor 470 Ω or more (10 kΩ: recommended).
Cautions 1. Input the clock from the X1 pin during on-chip debugging.
Figure 25-3. Connection Circuit Example (When Using QB-78K0MINI: X1 and X2 Are Used)
2. Control the X1 and X2 pins by externally pulling down the P31 pin or by using an external
QB-78K0MINI target connector
QB-78K0MINI target connector
circuit using the P130 pin (that outputs a low level when the device is reset).
Figure 25-2. Connection Circuit Example (When QB-78K0MINI Is Not Used)
RESET OUT
RESET OUT
RESET IN
RESET IN
FLMD0
FLMD0
GND
GND
V
V
X1
X2
X1
X2
DD
DD
CHAPTER 25 ON-CHIP DEBUG FUNCTION
User’s Manual U17554EJ4V0UD
Shorted by jumper
Target reset
Target reset
Oscillator is deleted
Note
Note
Note
Note
Target device
Target device
GND
GND
X2
P31
X2
P31
RESET
X1
V
RESET
X1
V
FLMD0
FLMD0
DD
DD