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Application Note
(Includes Differences for 970FX to 970MP)
Preliminary IBM PowerPC
®
970MP RISC Microprocessor
AppNote_970FX-MP_Differences_Body.fm.1.0
November 15, 2006
8. Package
Page 21 of 25
8.1.2 Capacitor Position
The 970MP capacitors are rotated 90 degrees compared to the 970FX capacitor layout with respect to the
A01 corner. This occurred since the PLL moved 90 degrees with respect to A01 and due to the die size of the
970MP - wider in the x direction than the 970FX because of the additional core. This change will be an impor-
tant design consideration if the thermal solution is orientation dependant.
8.2 Description of Signal Changes
Most of the pins on the 970MP are the same as those found on the 970FX package, though the pin place-
ment is different. However, there are a number of pins that are duplicated, one per core, several new or modi-
fied pins, and a few deletions.
Table 8-2 lists the duplicated 970FX pins, one per core on the PowerPC 970MP. Table 8-3 lists the new
PowerPC 970MP pins. Table 8-4 lists 970FX pins not found on PowerPC 970MP.
Table 8-2. 970FX Pins Duplicated for each 970MP Processing Unit
970FX 970MP Core0 970MP Core1 Function
HRESET_B
CP0_HRESET_B CP1_HRESET_B Hard Reset
SRESET_B
CP0_SRESET_B CP1_SRESET_B Soft Reset
INT_B
CP0_INT_B CP1_INT_B External Interrupt
QACK_B CP0_QACK_B CP1_QACK_B Quiesce Acknowledge
QREQ_B
CP0_QREQ_B CP1_QREQ_B Quiesce Request
DIODE_NEG CP0_DIODE_NEG CP1_DIODE_NEG Thermal Diode Terminal
DIODE_POS CP0_DIODE_POS CP1_DIODE_POS Thermal Diode Terminal
KVPRBVDD CP0_KELV_V0 CP1_KELV_V1 Kelvin Voltage (V
DD
) Monitor
KVPRBGND CP0_KELV_GND0 CP1_KELV_GND1 Kelvin Voltage (GND) Monitor
Table 8-3. New 970MP Pins
970MP New Pin Function
KELV_OVDD
Kelvin Voltage (OV
DD
) Monitor
KELV_GND2 Kelvin Voltage (GND) Monitor
MASTERSEL Select PU0 as master, tie to GND.
I2CSEL
Allows external selection of the I2C or JTAG
interface for controlling scan functionality
CP0_FRED_EN IBM MFG Test Only
CP0_FRED_GND IBM MFG Test Only
CP1_FRED_EN IBM MFG Test Only
CP1_FRED_GND IBM MFG Test Only