HD6433713 datasheet(128/324 Pages) RENESAS

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Port mode register 4 (PMR4)

PMR4 is an 8-bit read/write register that switches the P15/IRQ5/TMOE pin function and controls

TMOE pin waveform output. Bits 3 to 0 are reserved; they always read 1, and cannot be

modified.

Upon reset, PMR4 is initialized to H'0F.

Bit 7: Timer E output select (TEO)

Bit 6: Timer E output on/off (TEO ON)

Bit 5: Fixed frequency select (FREQ)

Bit 4: Variable frequency select (VRFR)

P15/IRQ5/TMOE pin functions are switched as follows, by means of bits 7 to 4 of PMR4 and bit

IRQC5 of PMR1.

PMR1

PMR4

Description

Bit 5

Bit 7

Bit 6

Bit 5

Bit 4

IRQC5 TEO

TEO ON FREQ

VRFR

Pin Function

Pin State

00P15 pin

Standard I/O port (initial value)

P15 pin

Standard I/O port

TMOE output pin (off)

Low level output

TMOE output pin (on)

Fixed frequency output:

(

φ/2048)

1.95 kHz (

φ = 4 MHz)

0.98 kHz (

φ = 2 MHz)

TMOE output pin (on)

Fixed frequency output:

(

φ/1024)

3.9 kHz (

φ = 4 MHz)

1.95 kHz (

φ = 2 MHz)

TMOE output pin (on)

Variable frequency output:

toggled by timer E overflow

IRQ5 input pin

External interrupt input

Note: * Don’t care

Bit

Initial value

Read/Write

TEO

R/W

TEO ON

R/W

FREQ

R/W

VRFR

R/W

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HD6433713 Datasheet(PDF) 128 Page - Renesas Technology Corp

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