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 | RCV56HCF PCI/CardBus Modem Designer’s Guide | |
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 | Table  | 
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| Label | I/O Type | 
 | Signal Name/Description | 
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 | ISDN INTERFACE  | 
| Ot2 | 
 | Device Bus Address Lines  | |
| It/Ot12 | 
 | Device Bus Data Line  | |
| DRD# | Ot2 | 
 | Read Enable. Connect to the MDP only | 
| DWR# | Ot2 | 
 | Write Enable. Connect to the MDP only | 
| ISDN_CS# | Ot2 | 
 | ISDN Chip Select. Leave open. | 
| ISDN_INT | It | 
 | ISDN Interrupt Request. Connect to GND. | 
| DRESET# | Ot2 | 
 | External Device Active Low Reset. Leave open. | 
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 | ISDN INTERFACE (ISDN MODELS) | 
| Ot2 | 
 | Device Bus Address Lines  | |
| It/Ot12 | 
 | Device Bus Data Line  | |
| DRD# | Ot2 | 
 | Read Enable. Connect to the ISDN interface device RD# pin. | 
| DWR# | Ot2 | 
 | Write Enable. Connect to the ISDN interface device WR# pin. | 
| ISDN_CS# | Ot2 | 
 | ISDN Chip Select. Connect to the ISDN interface device CS# pin. | 
| ISDN_INT | It | 
 | ISDN Interrupt Request. Connect to the ISDN interface device INT# pin. | 
| DRESET# | Ot2 | 
 | External Device Active Low Reset. Connect to the ISDN interface device RESET# pin. | 
| Notes: | 
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| 1. I/O types: | 
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| I/Opod | Input/Output, PCI, open drain (PCI type =o/d) | ||
| I/Opsts | Input/Output, PCI, sustained tristate (PCI type = s/t/s) | ||
| I/Opts | Input/Output, PCI, tristate (PCI type = t/s) | ||
| Ip | Input, PCI, totem pole (PCI type = in) | ||
| Ipts | Input, PCI (PCI type = t/s) | ||
| It | Input, TTL | 
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| It2 | Input, TTL, 2 mA | ||
| Itpd | Input, TTL, internal  | ||
| It/Ot | Input, TTL/Output, TTL | ||
| It/Ot12 | Input, TTL/Output, TTL, 12 mA | ||
| Opod | Output, PCI, open drain (PCI type =o/d) | ||
| Opts | Output, PCI, tristate (PCI type = t/s) | ||
| Ot | Output, TTL | 
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| Ot2 | Output, TTL, 2 mA | ||
| Ot4 | Output, TTL, 4 mA | ||
| Ot12 | Output, TTL, 12 mA | ||
2.NC = No external connection allowed (may have internal connection).
3.Interface Legend:
MDP = Modem Data Pump
| ROCKWELL PROPRIETARY INFORMATION | 1129 |