HMS87C5216 ETC1 [List of Unclassifed Manufacturers], HMS87C5216 Datasheet - Page 50

• Manufacturer Part Number: HMS87C5216
• Description: CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR UR(Universal Remocon) & WIRELESS KEYBOARD
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

HMS87C5216
13. INTERRUPTS
The GMS81C5016/24/32 interrupt circuits consist of Interrupt
Mode Register (MOD), Interrupt enable register (IENH, IENL),
Interrupt request flags of IRQH, IRQL, Priority circuit and Mas-
ter enable flag ("I" flag of PSW). 8 interrupt sources are provided.
The configuration of interrupt circuit is shown in Figure 13-1.
The GMS81C5016/24/32 contains 8 interrupt sources; 3 exter-
nals and 5 internals. Nested interrupt services with priority con-
trol is also possible. Software interrupt is non-maskable interrupt,
the others are all maskable interrupts.
13.1 Interrupt priority and sources.
Each interrupt vector is independent and has its own priority.
Software interrupt (BRK) is also available. Interrupt source clas-
- 8 interrupt source (2Ext, 3Timer, BIT, WDT and Key Scan)
Figure 13-1 Block Diagram of Interrupt
IFWDT
KSCN
IFBIT
INT1
INT2
IFT0
IFT1
IFT2
KSCNR
WDTR
INT1R
INT2R
BITR
IRQ
T0R
T1R
T2R
0
-
-
-
IENL
-
-
7
-
0
-
Internal Data Bus
IENH
-
sification is shown in Table 13-1.
- Software selection accept mode
- Read and write of interrupt request flag are possible.
- In interrupt accept, request flag is automatically cleared.
- 8 interrupt vector
- Nested interrupt control is possible
- Programmable interrupt mode
- Hardware accept mode
7
0
PRIORITY
CONTROL
IMOD
Standby Mode Release
-
SEP. 2004 Ver 1.01
7
-
BRK
VECTOR
ADDR.
INT.