SH7041A datasheet(488/923 Pages) RENESAS

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• Bit 9—Output Level Compare Enable (OCE): This bit enables the start of output level

comparisons. When setting this bit, pay special attention to the output pin combinations shown

in table 12.19. When 0 is output, the OSF bit is set to 1 at the same time this bit is set, and

output goes to high impedance. Accordingly, bits 15–11 and bit 9 of the port E data register

(PEDR) are set to 1. For the MTU output comparison, set the bit to 1 after setting the MTU’s

output pins with the PFC. Set this bit only when using pins as outputs.

When the OCE bit is set to 1, if OIE = 0 a high-impedance request will not be issued even if

OSF is set to 1. Therefore, in order to have a high-impedance request issued according to the

result of the output comparison, the OIE bit must be set to 1. When OCE = 1 and OIE = 1, an

interrupt request will be generated at the same time as the high-impedance request; however,

this interrupt can be masked by means of an interrupt controller (INTC) setting.

Bit 9: OCE

Description

Output level compare disabled (initial value)

Output level compare enabled; makes an output high impedance request

when OSF = 1.

• Bit 8—Output Short Interrupt Enable (OIE): Makes interrupt requests when the OSF bit of the

OCSR is set.

Bit 8: OIE

Description

Interrupt requests disabled (initial value)

Interrupt requests enabled

• Bits 7–0—Reserved: Always read as 0, and cannot be modified.

SH7041A Datasheet(PDF) 488 Page - Renesas Technology Corp