AM186ES Advanced Micro Devices, AM186ES Datasheet - Page 119

• Manufacturer Part Number: AM186ES
• Description: microcontrollers provide a low-cost/ high-performance solution for embedded system designers who wish to use the x86 architecture.
• Manufacturer: Advanced Micro Devices

7.4.5
Figure 7-20
Interrupt Request Register
(REQST, Offset 2Eh)
(Slave Mode)
The internal interrupt sources have interrupt request bits inside the interrupt controller. A
read from this register yields the status of these bits. The Interrupt Request register is a
read-only register. The format of the Interrupt Request register is shown in Figure 7-20.
For internal interrupts (D1/I6, D0/I5, TMR2, TMR1, and TMR0), the corresponding bit is set
to 1 when the device requests an interrupt. The bit is reset during the internally generated
interrupt acknowledge.
Interrupt Request Register
The REQST register is set to 0000h on reset.
Bits 15–6: Reserved
Bits 5–4: Timer 2/Timer 1 Interrupt Request (TMR2–TMR1)—When set to 1, these bits
indicate the state of any interrupt requests from the associated timer.
Bits 3–2: DMA Channel Interrupt Request (D1/I6–D0/I5)—When set to 1, D1/I6–D0/I5
indicate that the corresponding DMA channel or INT5/INT6 has an interrupt pending.
Bit 1: Reserved
Bit 0: Timer 0 Interrupt Request (TMR0)—When set to 1, this bit indicates the state of
an interrupt request from timer 0.
15
Reserved
Interrupt Control Unit
7
TMR2
TMR1
D1/I6
D0/I5
Res
TMR0
0
7-31