R2000 datasheet(30/75 Pages) ETC

30 / 75 page

Indy® R2000 Electrical, Mechanical, & Thermal Specification

Table 18: Indy R2000 Modes

Mode

Pin Setting

Description

Normal mode, Parallel

interface

SCAN_test = 0

Chip_resetn = 1

Dtest1 = 1

Indy R2000 is in normal

operation mode using the

parallel interface.

Normal mode, Serial

interface

SCAN_test = 0

Chip_resetn = 1,

Dtest1 = 0

Indy R2000 is in normal

operation mode using the

serial interface

Factory Test Mode

SCAN_test = 1

All analog blocks are

disabled and the chip is put

into factory test mode.

Table 19: Pin Functionality per Mode

Pin Name

Parallel Interface

Serial Interface

DA3

t2r_frm

DA2

t2r_dat[2]

DA1

t2r_dat[1]

DA0

t2r_dat[0]

ALE

r2t_frm

CSn

r2t_clk

RDn

t2r_clk

WRn

r2t_dat

7.1

Serial Interface

The serial interface has four channels: one going to the Indy R2000 (R2T) and three going from the IndyR2000

(T2R). Each direction has its own clock and frame synchronization signals (R2T_CLK, T2R_CLK and T2R_FRM,

R2T_FRM). The channels are denoted as R2T_D0 and T2R_D0-2.

The data is transferred in 32-bit frames delimited with the frame synchronization signal. The data is sent most

significant bit (MSB) first, and the frame synchronization must occur one bit period before the MSB of the frame.

When the Indy R2000 transfers data in response to a read request, it uses the lowest channel available. The chip

can queue up to 16 read responses. The format of the data frame is shown in Figure 6-4.

Figure 6-4: Serial Interface Frame Format

rank

address

data

= an access is being attempted (0 indicates an empty frame)

= the access is a WRITE operation (0 indicates a READ)

rank

= the order of multiple frames of data from a single register

address = the address of the register being accessed

data

= the data read from or written to the register

R2T:

On read requests, the data field shall be all 0's. The rank field

shall always be zero.

T2R:

The W field shall always be 0.

Null frames in either direction shall have the A field cleared.

31 30 29 28 27

16 15

The A parameter determines if this access has valid data or if it is an empty frame. The W parameter is set if the

frame is a write operation. For T2R, this parameter is always set to zero. If the same source is read several times,

the rank parameter determines the order of the incoming frames. For R2T transfers, this parameter is always set to

zero. To perform a read request, the data field must be set to zero. With the serial interface, there is an additional

possibility of auto-reading certain registers. When auto-reading is enabled each time, the source register is clocked

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