UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 222

• 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

222
Address: FFE4H
Address: FFE5H
Symbol
Symbol
MK0
MK1
(2)
Interrupt mask flag registers (MK0, MK1)
The interrupt mask flag is used to enable and disable the corresponding maskable interrupts.
MK0 and MK1 are set with a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets MK0 and MK1 to FFH.
Caution Because P30, P31, P41, and P43 have an alternate function as external interrupt inputs,
××MK×
ADMK
<7>
0
1
7
1
After reset: FFH
After reset: FFH
when the output level is changed by specifying the output mode of the port function, an
interrupt request flag is set. Therefore, the interrupt mask flag should be set to 1 before
using the output mode.
TMMK010 TMMK000 TMMKH1
Enables interrupt servicing.
Disables interrupt servicing.
STMK6
<6>
<6>
Figure 12-3. Format of Interrupt Mask Flag Registers (MK0, MK1)
SRMK6
<5>
<5>
R/W
R/W
CHAPTER 12 INTERRUPT FUNCTIONS
SREMK6
<4>
<4>
User’s Manual U16898EJ5V0UD
TMMK80
PMK1
<3>
<3>
Interrupt servicing control
PMK0
PMK3
<2>
<2>
LVIMK
PMK2
<1>
<1>
1
1
0
0