DS31256 Maxim Integrated Products, DS31256 Datasheet - Page 137

• Manufacturer Part Number: DS31256
• Description: IC CTRLR HDLC 256-CHANNEL 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS31256

• Controller Type: HDLC Controller
• Interface: Serial
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 500mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

10.2 PCI Configuration Register Description
Register Name:
Register Description:
Register Address:
MSB
Bits 0 to 15/Vendor ID. These read-only bits identify Dallas Semiconductor as the device’s manufacturer. The
vendor ID was assigned by the PCI Special Interest Group and is fixed at 13EAh.
Bits 16 to 31/Device ID. These read-only bits identify the DS31256 as the device being used. The device ID was
assigned by Dallas Semiconductor and is fixed at 3134h.
Register Name:
Register Description:
Register Address:
MSB
Note: Read-only bits in the PCMD0 register are underlined; all other bits are read-write.
The lower word (bits 0 to 15) of the PCMD0 register is the command portion and is used for PCI bus control.
When all bits in the lower word are set to 0, the device is logically disconnected from the bus for all accesses,
except for accesses to the configuration registers. The upper word (bits 16 to 31) is the status portion and is used
for status information. Reads to the status portion behave normally but writes are unique in that bits can be reset
(i.e., forced to 0) but not set (i.e., forced to 1). A bit in the status portion resets when 1 is written to that bit
position. Bit positions that have 0 written to them do not reset.
STEPC
FBBCT
PPE
PARC
UDF
PSE
Reserved (Read Only/Set to All Zeros)
PVID0
PCI Vendor ID/Device ID Register 0
0x000
PCMD0
PCI Command/Status Register 0
0x004
VGA
66MHz
MABT
Vendor ID (Read Only/Set to EAh)
Vendor ID (Read Only/Set to 13h)
Device ID (Read Only/Set to 34h)
Device ID (Read Only/Set to 31h)
MWEN
TABTM
137 of 183
DS31256 256-Channel, High-Throughput HDLC Controller
SCC
Reserved (Read Only/Set to All Zeros)
TABT
MASC
DTS1
MSC
FBBEN
DTS0
PSEC
LSB
IOC
PARR
LSB