LAN91C95 Ver la hoja de datos (PDF) - SMSC -> Microchip
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LAN91C95 Datasheet PDF : 144 Pages
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PIN NO.
NAME
24
nModem
Reset
18
Modem
Interrupt
23
nModem
Chip Select
17
Modem
Ready
27
nModem
Powerdown
26
20
Modem Ring
Input
21
nModem
Ring Output
A
22
Modem Ring
Output B
14
Speaker
Input
DESCRIPTION OF PIN FUNCTIONS
SYMBOL
TYPE
DESCRIPTION
nMRESET
O4
Reset output to Modem. Asserted whenever
RESET pin is high, internal POR is active, or
SRESET bit is high (MCOR bit 7).
MINT
I with pull
down
Interrupt input from Modem. Reflected in INTR
(CSR bit 1) and asserts the appropriate
interrupt pin if enabled.
nMCS
O4
Chip select output to modem.
MRDY
nMPWDN
MIDLEN1
MRINGIN
nMRINGOA
MRINGOB
SPKRIN
I with pullup
O4
O4
I
O4
O4
I with pullup
12
Modem ready input. Low indicates the modem
is not ready, either after reset or exiting from
stop or sleep modes.
Powerdown output to modem controller. This
pin is active (low) when either the PWRDWN
bit (CSR bit 2) is set or the modem is disabled
(not configured).
Powerdown output to modem controller. This
pin is active (high) when either the PWRDWN
bit (CSR bit 2) is set or the modem is disabled
(not configured).
Ring input from the modem controller. Toggles
when ringing, low when not ringing.
Ring output signal. When there is no ringing
on the MRINGIN pin and the modem is not in
Powerdown mode this output is high. During
ringing this signal is the inverse of the
MRINGIN input. When the PWRDWN bit is
set or the function is disabled, this output is
low. This signal is activated about 12 msec
after removing Powerdown.
Ring output signal. When the modem is not in
Powerdown mode (PWRDWN bit is zero and
the function is enabled) this output follows the
value of the MRINGIN input. When entering
Powerdown mode, a rising edge is generated
on the pin. A rising edge is also generated
when exiting Powerdown mode also. Refer to
Figure 2.
Speaker Input. This is a digitized (single level)
audio input from the modem controller.
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