Cirrus-logic CS61884 Instrukcja Użytkownika Pobierz pdf (Strona 12)

CS61884

12 DS485F3

WR/DS/SDI/LEN0 84 J14 I

Data Strobe/ Write Enable/Serial Data/Line Length Input

Intel Parallel Host Mode

- This pin “WR” functions as a

write enable.

Motorola Parallel Host Mode

- This pin “DS“ functions as

a data strobe input.

Serial Host Mode

- This pin “SDI” functions as the serial

data input.

Hardware Mode

- As LEN0, this pin controls the transmit

pulse shapes for both E1 and T1/J1 modes. This pin also

selects which mode is used E1 or T1/J1 (Refer to Table 5

on page 25).

/RW/LEN1 85 J13 I

Read/Write/ Read Enable/Line Length Input

Intel Parallel Host Mode

- This pin “RD” functions as a

read enable.

Motorola Parallel Host Mode

- This pin “R/W” functions as

the read/write input signal.

Hardware Mode

- As LEN1, this pin controls the transmit

pulse shapes for both E1 and T1/J1 modes. This pin also

selects which mode is used E1 or T1/J1 (Refer to Table 5

on page 25).

ALE/AS

/SCLK/LE

86 J12 I

Address Latch Enable/Serial Clock/Address Strobe/Line

Length Input

Intel Parallel Host Mode

- This pin “ALE” functions as the

Address Latch Enable when configured for multiplexed ad-

dress/data operation.

Motorola Parallel Host Mode

- This pin “AS” functions as

the active “low” address strobe when configured for multi-

plexed address/data operation.

Serial Host Mode

- This pin “SCLK” is the serial clock

used for data I/O on SDI and SDO.

Hardware Mode

- As LEN2, this pin controls the transmit

pulse shapes for both E1 and T1/J1 modes. This pin also

selects which mode is used E1 or T1/J1 (Refer to Table 5

on page 25).

/JASEL 87 J11 I

Chip Select Input/Jitter Attenuator Select

Host Mode

- This active low input is used to enable ac-

cesses to the microprocessor interface in either serial or

parallel mode.

Hardware Mode

- This pin controls the position of the Jitter

Attenuator.

SYMBOL LQFP LFBGA TYPE DESCRIPTION

Pin State Jitter Attenuation Position

LOW Transmit Path

HIGH Receive Path

OPEN Disabled

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 71 72

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