r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 309

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Notes: 1. When IRLM0 and IRLM1 are changed from 0 to 1, the IRL interrupt source that has
Bit
21
20 to 0
2. When using the IRQ/IRL3 to IRQ/IRL0 pins or IRQ/IRL7 to IRQ/IRL4 pins as encoded
Name
LVLMODE 0
⎯
been detected or held is cleared. When IRLM0 and IRLM1 are changed from 1 to 0, the
IRL interrupt source that has been detected or held is not cleared.
IRL interrupt inputs, set IM00 to IM03 or IM04 to IM07 of the interrupt mask register 0 to
1, respectively.
Initial
Value
All 0
R/W
R/W
R
Description
Level-sense IRQ/IRL with holding function
Selects whether or not to use the holding function for
level-sense IRQ and IRL interrupts.
0: Level-sense IRQ and IRL interrupt requests are held
1: Level-sense IRQ and IRL interrupt requests are not
Rewriting to this bit should be performed by the
initialization routine before canceling the masking
(INTMASK0 and INTMASK1) for the IRQ interrupts and
IRL interrupt. After this, do not rewrite this bit until
power-on reset or manual reset is made. The initial
value is 0, however. it is recommended to use INTC
after this bit has been set to 1 by the initialization
routine.
For the details of the operation when this bit is set to 0,
refer to section 10.4.2, IRQ Interrupts, section 10.4.3,
IRL Interrupts, section 10.7.1, Example of Handing
Routine of IRL Interrupts and Level Detection IRQ
Interrupts when ICR0.LVLMODE = 0, and section
10.7.3, Clearing IRQ and IRL Interrupt Requests.
Reserved
These bits are always read as 0. The write value
should always be 0.
(initial value)
held
Rev.1.00 Jan. 10, 2008 Page 279 of 1658
10. Interrupt Controller (INTC)
REJ09B0261-0100