tmpr4937 TOSHIBA Semiconductor CORPORATION, tmpr4937 Datasheet - Page 454

• Manufacturer Part Number: tmpr4937
• Description: 64-bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

15.3.7
IRRCNT.EXTPOL
IRRCNT.INTPOL
IRMASK[15]
Interrupt requests
the TX49/H3 core by using a 16-bit interrupt request flag register. REQ[1]* signals are used as interrupt
output signals. Consequently, external interrupt requests can only be used when in the PCI External
Arbiter mode. Also, internal interrupt requests are assigned to interrupt number 13 of the Interrupt
Controller (IRC).
•
•
•
•
that perform an OR operation on all bits.
can select whether the external interrupt supply signal is open drain output or totem pole output.
IRFLAG[15]
IRPOL[15]
It is possible to make interrupt requests to external devices and interrupt requests (IRC interrupts) to
The following six registers set the interrupts.
The following formulas derive the interrupt generation conditions:
In the above formulas, “^” indicates Exclusive OR operations and “|” indicates reduction operators
Also, the External Interrupt OD Control bit (IRRCNT.OD) of the Interrupt Request Control Register
Interrupt Request Flag Register (IRFLAG0, IRFLAG1)
Interrupt Request Polarity Control Register (IRPOL)
Interrupt Request Mask Register (IRMASKINT, IRMASKEXT)
Interrupt Request Control Register (IRRCNT)
Internal interrupt request =
External interrupt request =
(|((IRFLAG[15:0] ^ IRPOL[15:0]) & IRMASKINT[15:0]))^ IRRCNT.INTPOL
(|((IRFLAG[15:0] ^ IRPOL[15:0] ) & IRMASKEXT[15:0]))^ IRRCNT.EXTPOL
Figure 15.3.1 External Interrupt Request Logic
15-8
Chapter 15 Interrupt Controller
Internal Interrupt
Request
(0: Request present)
External Interrupt Request