HD404374FT datasheet(72/161 Pages) RENESAS

Part #	HD404374FT

Description	Low-Voltage AS Microcomputers with On-Chip A/D Converter

PDF	161 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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72 / 161 page

HD404374/HD404384/HD404389/HD404082/HD404084 Series

Rev.5.00, Sep.11.2003, page 72 of 161

Bit

Read/Write

Initial value on reset

Bit name

TMA3*4

TMA2

TMA1

TMA0

TMA3*4

TMA2

TMA1

TMA0

Source prescaler

PSS

PSW

Input clock period

2,048 tcyc

1,024 tcyc

512 tcyc

128 tcyc

32 tcyc

8 tcyc

4 tcyc

2 tcyc

32 twcyc

16 twcyc

8 twcyc

2 twcyc

1/2 twcyc

Operating mode

Timer A

mode

Time base

mode

Timer mode register A (TMA: $00F)

Not Used

PSW, TCA reset

x : Don't care

Notes : 1. twcyc = 244.14 µs (using 32.768 kHz crystal oscillator)

2. Timer/counter overflow output period (s) = input clock period (s)

× 256.

3. The division ratio must not be changed while time base mode is being used, as this

will result in an error in the overflow period.

4. Applies to HD404374 Series. In HD404384, HD404389, HD404082 and HD404084

Series, write as 0.

Figure 33 Timer Mode Register A (TMA)

HD404374FT Datasheet(PDF) 72 Page - Renesas Technology Corp

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