I510X Datasheet, PDF (9/16 Pages) Taiwan Memory Technology – CompactFlash Memory Card

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i510x
3. Reset voltage detector and RC oscillator
Power-on-reset and brown-out-reset
The internal reset control unit has power-on-reset (POR) and brown-out-reset (BOR) functions. To use
internal POR, set SEL_RST to 1 and RESET# must be connected to an external capacitor as shown in Fig. 3.
To use external reset signal, set SEL_RST to 0 and RESET# becomes the reset signal input.
3.3V Vdd
SEL_RST
RESET#
Cext
Figure 3. Pin connection to use internal power-on-reset/brown-out-reset
Internal RC oscillator
An integrated RC oscillator can be used to reduce BOM cost. When the internal oscillator is enabled,
ROSC must be connected to 3.3V through a resistor, as shown in Figure 4, while CLKI is not connected. The
value of Rext determines the oscillator frequency. The relationship of Rext and typical oscillator frequency is
as follows.
Rext
15KΩ
22KΩ
30KΩ
58KΩ
Fosc
50MHz
40MHz
33MHz
20MHz
3.3V Vdd
Rext
3.3V Vdd
CLKI
ROSC
SEL_CLK
Figure 4. Pin connection to use internal Oscillator
Release date: 12/9/2004
© 2004 iCreate Technologies Corporation
iCreate Technologies Corporation reserves the right to change the specification in any manner without notice.
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