SH7041A datasheet(180/923 Pages) RENESAS

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• Bit 10—NMI Flag Bit (NMIF): Indicates that an NMI interrupt has occurred. When the NMIF

bit is set, DTC transfers are not allowed even if the DTER bit is set to 1. If, however, a transfer

has already started with the NMIM bit of the DTMR set to 1, execution will continue until that

transfer ends. To clear the NMIF bit, read the 1 from it, then write a 0.

The NMIF bit is initialized to 0 by power-on resets and in standby mode.

Bit 10 (NMIF)

Description

No NMI interrupts (initial value)

(Clear condition) Write a 0 after reading the NMIF bit

NMI interrupt has been generated

• Bit 9—Address Error Flag (AE): Indicates that an address error by the DTC has occurred.

When the AE bit is set, DTC transfers are not allowed even if the DTER bit is set to 1. To clear

the AE bit, read the 1 from it, then write a 0.

The AE bit is initialized to 0 by power-on resets and in standby mode.

Bit 9 (AE)

Description

No address error by the DTC (initial value)

(Clear condition) Write a 0 after reading the AE bit

An address error by the DTC occurred

• Bit 8—DTC Software Activation Enable Bit (SWDTE): This bit enables/disables DTC

activation by software.

The AE bit is initialized to 0 by resets and standby mode. For details, see section 8.3.2,

Activating Sources.

Bit 8 (SWDTE)

Description

DTC activation by software disabled (initial value)

DTC activation by software enabled

• Bits 7–0—Software Activation Vectors 7–0 (DTVEC7–DTVEC0): These bits set the DTC

vector addresses for DTC activation by software. A vector address is calculated as H'0400 +

DTVEC[7:0]. Always specify 0 for DTVEC0. 8 bits are available, so you can specify values

H'00 (0)–H'FE (254).

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