INTERRUPTS
KS57C2308/P2308/C2316/P2316
7-12
INTERRUPT FLAGS
There are three types of interrupt flags: interrupt request and interrupt enable flags that correspond to each
interrupt, the interrupt master enable flag, which enables or disables all interrupt processing.
Interrupt Master Enable Flag (IME)
The interrupt master enable flag, IME, enables or disables all interrupt processing. Therefore, even when an
IRQx flag is set and its corresponding IEx flag is enabled, the interrupt service routine is not executed until the
IME flag is set to logic one.
The IME flag is located in the IPR register (IPR.3). It can be directly be manipulated by EI and DI instructions,
regardless of the current value of the enable memory bank flag (EMB).
Interrupt Enable Flags (IEx)
IEx flags, when set to logical one, enable specific interrupt requests to be serviced. When the interrupt request
flag is set to logical one, an interrupt will not be serviced until its corresponding IEx flag is also enabled.
Interrupt enable flags can be read, written, or tested directly by 1-bit instructions. IEx flags can be addressed
directly at their specific RAM addresses, despite the current value of the enable memory bank (EMB) flag.
Table 7-7. Interrupt Enable and Interrupt Request Flag Addresses
NOTES:
1.
IEx refers to all interrupt enable flags.
2.
IRQx refers to all interrupt request flags.
3.
IEx = 0 is interrupt disable mode.
4.
IEx = 1 is interrupt enable mode.
IME
IPR.2
IPR.1
IPR.0
Effect of Bit Settings
0
Inhibit all interrupts
1
Enable all interrupts
Address
Bit 3
Bit 2
Bit 1
Bit 0
FB8H
IE4
IRQ4
IEB
IRQB
FBAH
0
0
IEW
IRQW
FBCH
0
0
IET0
IRQT0
FBDH
0
0
IES
IRQS
FBEH
IE1
IRQ1
IE0
IRQ0
FBFH
0
0
IE2
IRQ2
Summary of Contents for KS57C2308
Page 30: ...ADDRESS SPACES KS57C2308 P2308 C2316 P2316 2 22 NOTES ...
Page 168: ...SAM47 INSTRUCTION SET KS57C2308 P2308 C2316 P2316 5 94 NOTES ...
Page 170: ......
Page 206: ...POWER DOWN KS57C2308 P2308 C2316 P2316 8 8 NOTES ...
Page 210: ...RESET KS57C2308 P2308 C2316 P2316 9 4 NOTES ...
Page 222: ...I O PORTS KS57C2308 P2308 C2316 P2316 10 12 NOTES ...
Page 272: ...LCD CONTROLLER DRIVER KS57C2308 P2308 C2316 P2316 12 24 NOTES ...
Page 280: ...SERIAL I O INTERFACE KS57C2308 P2308 C2316 P2316 13 8 NOTES ...
Page 294: ...MECHANICAL DATA KS57C2308 P2308 C2316 P2316 15 2 NOTES ...
Page 310: ...KS57P2308 P2316 OTP KS57C2308 P2308 C2316 P2316 16 16 NOTES ...
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