TL16PNP200 Datasheet, PDF (5/23 Pages) Texas Instruments – STANDALONE PLUG-AND-PLAY (PnP) CONTROLLER

TL16PNP200
STANDALONE PLUGĆANDĆPLAY (PnP) CONTROLLER
SLLS229A − NOVEMBER 1995 − REVISED APRIL 1996
Terminal Functions
TERMINAL
NAME
I/O
NO.
DESCRIPTION
PNP_BUSY
65 O Plug-and-play busy. PNP_BUSY signal requests access to the EEPROM and is asserted during PNP
configuration. On-board logic uses this signal to determine when it can access the EEPROM. This signal
can also be used as a soft reset.
RESET
41
I Reset. When active (high), RESET clears most logical device registers and puts the TL16PNP200 in the
wait-for-key state. All configuration registers are loaded with their power-up defaults, and card select
number (CSN) is reset to 0.
SCLK
63 O Serial clock (3-state output path). SCLK controls the serial bus timing for address and data. A 100 µA
pulldown transistor is connected internally to this terminal.
SCS
64 O EEPROM chip select. SCS controls the activity of the EEPROM. A 100 mA pulldown transistor is connected
internally to this terminal.
SIO
62 I/O Serial input/output. SIO is a 3-state bidirectional EEPROM I/O data path. A 100 µA pulldown transistor is
connected internally to this terminal .
SROM_BUSY
69
I Serial EEPROM busy. SROM_BUSY is asserted by on-board logic during its access to the EEPROM.
VCC
10,32,
46,68
5-V supply voltage.
detailed description
modes of operation
The TL16PNP200 operates in one of two modes: Mode 0 or Mode1. The mode is selected by setting the mode
bit in the power-up defaults (see defaults format section).
Mode 0:
• Supports two logical devices
• Supports memory, I/O, IRQ, and DMA for each of the two logical devices
• Routes device DMA request to three DMA channels that can be connected to any three DMA channels
on the ISA bus
• Has one configurable OEN signal
Mode 1:
• Supports five logical devices
• Supports I/O and IRQ for the five logical devices and supports DMA for two logical devices
• Routes device DMA requests to five DMA channels that can be connected to any five DMA channels on
the ISA bus
• Has two configurable OEN signals
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