UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 325

• 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

19.1.1 Connection of INTP3 pin
X1 and X2 pins can be used as I/O port pins or the pins for oscillation, after the monitor program has been written.
Design circuits appropriately according to the relevant case among the cases shown below.
Pins for communication depend on whether the monitor program has been written or not. (refer to Table 19-1)
The INTP3 pin is used only for communication between QB-MINI2 and the target device during debugging.
(1) INTP3 pin is not used in target system (as is illustrated in Figure 19-1.
(2) QB-MINI2 is used only for programming, not for debugging
(3) QB-MINI2 is used for debugging and debugging of the INTP3 pin is performed only with a real machine
Note 5.
Figure 19-3. Circuit Connection for the Case Where QB-MINI2 Is Used Only for Programming
Figure 19-2. Circuit Connection for the Case Where INTP3 Pin Is Not Used in Target System
Connection)
→ See Figure 19-2.
→ See Figure 19-3.
→ See Figure 19-4.
The INTP3 pin is used for communication between QB-MINI2 and the target device during
debugging.
alternate-function pin cannot be used. For INTP3 pin connection, refer to 19.1.1 Connection of
INTP3 pin.
X1, X2, RESET, INTP3, V
Before writing the monitor program
Target connector
Target connector
Table 19-1. Pins for communication with QB-MINI2
When debugging is performed with QB-MINI2, therefore, the INTP3 pin and its
INTP
INTP
CHAPTER 19 ON-CHIP DEBUG FUNCTION
12
12
User’s Manual U16898EJ5V0UD
DD
, V
SS
V
DD
1 kΩ
RESET, INTP3, V
After writing the monitor program
INTP3
INTP3
Target device
Target device
DD
, V
SS
Recommended Circuit
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