PC755 datasheet(9/50 Pages) ATMEL

9 / 50 page

PC755/745

2138D–HIREL–06/03

Notes:

1. OV

DD supplies power to the processor bus, JTAG, and all control signals and VDD supplies power to the processor core and

the PLL (after filtering to become AVDD). These columns serve as a reference for the nominal voltage supported on a given

signal as selected by the BVSEL pin configuration of Table 4 and the voltage supplied. For actual recommended value of VIN

or supply voltages see Table 3.

2. These are test signals for factory use only and must be pulled up to OVDD for normal machine operation.

3. To allow for future I/O voltage changes, provide the option to connect BVSEL independently to either OVDD (selects 3.3V) or

to OGND (selects 1.8V/2.0V).

4. Uses one of 15 existing no

-connects in PC745’s 255-BGA package.

5. Internal pull up on die.

6. Internally tied to GND in the PC745 255

-BGA package to indicate to the power supply that a low-voltage processor is

present. This signal is not a power supply input.

MCP

C13

Low

Input

–

NC (No

Connect)

B7, B8, C3, C6, C8, D5, D6, H4, J16, A4, A5, A2, A3, B5

–

OVDD

C7, E5, E7, E10, E12, G3, G5, G12, G14, K3, K5, K12, K14,

M5, M7, M10, M12, P7, P10

–

1.8V/2.0V

3.3V

PLL_CFG[0

-3]

A8, B9, A9, D9

High

Input

–

QACK

Low

Input

–

QREQ

Low

Output

–

RSRV

Low

Output

–

SMI

A16

Low

Input

–

SRESET

B14

Low

Input

–

SYSCLK

–

Input

–

H14

Low

Input

–

TBEN

High

Input

–

TBST

A14

Low

I/O

–

TCK

C11

High

Input

–

TDI(5)

A11

High

Input

–

TDO

A12

High

Output

–

TEA

H13

Low

Input

–

TLBISYNC

Low

Input

–

TMS(5)

B11

High

Input

–

TRST(5)

C10

Low

Input

–

J13

Low

I/O

–

TSIZ[0

-2]

A13, D10, B12

High

Output

–

TT[0

-4]

B13, A15, B16, C14, C15

High

I/O

–

Low

Output

–

DD 2

F6, F8, F9, F11, G7, G10, H6, H8, H9, H11, J6, J8, J9, J11,

K7, K10, L6, L8, L9, L11

–

VOLTDET(6)

High

Output

–

Table 1. Pinout Listing for the PC745, 255 PBGA Package (Continued)

Signal Name

Pin Number

Active

I/O

I/F Voltages Supported(1)

1.8V/2.0V

3.3V

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