MPC7455 datasheet(37/64 Pages) FREESCALE

37 / 64 page

MPC7455 RISC Microprocessor Hardware Specifications, Rev. 4.1

Freescale Semiconductor

Pinout Listings

TBEN

High

Input

BVSEL

TBST

F11

Low

Output

BVSEL

TCK

High

Input

BVSEL

TDI

High

Input

BVSEL

TDO

High

Output

BVSEL

TEA

Low

Input

BVSEL

TEST[0:3]

A12, B6, B10, E10

—

Input

BVSEL

TEST[4]

D10

—

Input

BVSEL

TMS

High

Input

BVSEL

TRST

Low

Input

BVSEL

7, 14

Low

I/O

BVSEL

TSIZ[0:2]

G6, F7, E7

High

Output

BVSEL

TT[0:4]

E5, E6, F6, E9, C5

High

I/O

BVSEL

Low

Output

BVSEL

VDD

H8, H10, H12, J7, J9, J11, J13, K8, K10,

K12, K14, L7, L9, L11, L13, M8, M10, M12

——

N/A

Notes:

1. OVDD 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). To program the I/O voltage, connect BVSEL to either GND

(selects 1.8 V) or to HRESET (selects 2.5 V). If used, the pulldown resistor should be less than 250

Ω. For actual

recommended value of Vin or supply voltages see Table 4.

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

3. These signals are for factory use only and must be left unconnected for normal machine operation.

4. Ignored in 60x bus mode.

5. This signal selects between MPX bus mode (asserted) and 60x bus mode (negated) and will be sampled at

HRESET going high.

6. This signal must be negated during reset, by pull-up to OVDD or negation by ¬HRESET (inverse of HRESET), to

ensure proper operation.

7. Internal pull-up on die.

8. These pins require weak pull-up resistors (for example, 4.7 k

Ω) to maintain the control signals in the negated state

after they have been actively negated and released by the MPC7445 and other bus masters.

9. These input signals are for factory use only and must be pulled down to GND for normal machine operation.

10.This pin can externally cause a performance monitor event. Counting of the event is enabled via software.

11.Unused address pins must be pulled down to GND.

12.This test signal is recommended to be tied to HRESET; however, other configurations will not adversely affect

performance.

13.These signals must be pulled down to GND if unused, or if the MPC7445 is in 60x bus mode.

14.This signal must be asserted during reset, by pull-down to GND or assertion by HRESET, to ensure proper

operation.

Table 15. Pinout Listing for the MPC7445, 360 CBGA Package (continued)

Signal Name

Pin Number

Active

I/O

I/F Select 1

Notes

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