Ricoh R5C841 - Manual (Page 47)

R5C841 PCI-CardBus/IEEE 1394/SD Card/Memory Stick/xD/ExpressCard Data Sheet
12345  2004 R EV .1.10 4-22
4.21.1 PC Card LED (CardBus R2)
The trigger signals of the PC Card LED are as follows.
CardBus: CFRAM#, CINT#
R2: Card command by IORD#, IOWR#, OE#, WE#, IREQ#
Bit 13 and bit 12 of the Config (Func.0) A2h register can set the counter’s duration.
bit 13 12 the LED Output Duration
0 0 64 msec (default)
1 1 1 msec
1 0 No Duration Time (through)
0 1 Test Mode(3.8µsec)
4.21.2 1394 LED
The 1394 LED signal indicates the condition of the IEEE1394 interface block in the R5C841. This
signal is asserted when the R5C841 is on transmission/reception.
Bit 2 and bit 1 of the Config (Func.1) 9Eh register can set the counter’s duration.
bit 2 1 the LED Output Duration
0 0 64 msec (default)
1 1 1 msec
1 0 No Duration Time (through)
0 1 Test Mode(3.8µsec)
4.21.3 SD LED
The SD LED signal indicates conditions of the SD Card interface in the R5C841. This signal is
asserted when the R5C841 is on the transmission, the reception and the debounce duration of
the card detection. Bit 29 and bit 28 of the Config (SD: Func.2) F8h register can set the counter’s
duration.
bit 29 28 the LED Output Duration
0 0 64 msec (default)
1 1 1 msec
1 0 No Duration Time (through)
0 1 Test Mode (3.8µsec)
4.21.4 MS LED/xD LED
The MS LED and the xD LED signals indicate conditions of the Memory Stick interface and the
xD Picture Card interface in the R5C841. This signal is asserted when the R5C841 is on the
transmission and the reception. Bit 29 and bit 28 of the Config (MS: Func.3, xD: Func.4) F8h
register can set the counter’s duration.
bit 29 28 the LED Output Duration
0 0 64 msec (default)
1 1 1 msec
1 0 No Duration Time (through)
0 1 Test Mode (3.8µsec)