PEB 20571 F V3.1 Infineon Technologies, PEB 20571 F V3.1 Datasheet - Page 266

• Manufacturer Part Number: PEB 20571 F V3.1
• Description: IC LINE CARD CTRLR DSP TQFP-100
• Manufacturer: Infineon Technologies

Specifications of PEB 20571 F V3.1

• Function: PBX Controller with DSP
• Interface: ISDN
• Voltage - Supply: 3.13 V ~ 3.47 V
• Current - Supply: 272.6mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LFQFP
• Includes: Layer-1 Control, Signaling Control, Signal Processing, Voice Channel Handling
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Number Of Circuits: -
• Other names: PEB20571FV3.1X; PEB20571FV31XP; SP000007539

8.6
8.6.1
The exact behavior required from every P interface signal during a DMA access,
determined according to the following modes:
1. Motorola/Intel Mode: Determined by the MODE input pin.
2. Normal/Fly-By mode: Programmable mode, in the control register of the P-interface.
In any mode, the DACK input alone is used to indicate that this is a DMA transaction,
and to select the DMA mail-box. An activation of CS is not required in such cases.
8.6.1.1
In this mode DS is used for timing the access, while R/W is used to distinguish between
DMA read transactions and DMA write transactions. The R/W input signal is used
differently in Normal mode and in Fly-By mode. The next table details the way in which
R/W should be used in each mode, during DMA transactions:
Table 63
Mode
Normal (Non-Fly-By)
Fly-By
In Fly-By mode R/W is used inverted, because the same signal, R/W, is required for
concurrent accessing of an external memory device.
Data Sheet
AC Characteristics
DMA Access Timing
DMA Access Timing In Motorola Mode
R/W Behavior During DMA Transactions in Normal and in Fly-By
Mode
R/W = ‘0’
Write DMA transaction.
(A response to DMA
transmitter request)
Read DMA transaction.
(A response to DMA
receiver request)
Electrical Characteristics and Timing Diagrams
249
R/W = ‘1’
Read DMA transaction.
(A response to DMA receiver
request)
Write DMA transaction.
(A response to DMA transmitter
request)
PEB 20570
PEB 20571
2003-07-31