Motorola PowerPC MPC750 Errata

Risc microprocessor

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Errata to

MPC750 RISC Microprocessor UserÕs

Manual

This errata describes corrections to the MPC750 RISC Microprocessor

UserÕs Manual . These corrections also apply to the MPC740, which is

described in MPC750 RISC Microprocessor UserÕs Manual . For

convenience, the section number and page number of the errata item in the

userÕs manual are provided.

To locate any published updates for this document, refer to the world-wide

web at http://www.mot.com/powerpc.

Section/Page

2.1.1, 2-7

2.1.2.2, 2-12

This document contains information on a new product under development by Motorola and IBM. Motorola and IBM reserve the right to change or

discontinue this product without notice.

Changes

The implementation note for the decrementer register

(DEC) should read as follows:

In the MPC750 the decrementer register is decremented

and the time base is incremented at a speed that is

one-fourth the speed of the bus clock.

In Table 2-4, replace the description of HID0[DBP]

(bit 1), with the following:

MPC750UMAD/AD

1/1999

Rev. 1

Page 1 In Table 2-4, replace the description of HID0[DBP] (bit 1), with the following: This document contains information on a new product under development by Motorola and IBM. Motorola and IBM reserve the right to change or discontinue this product without notice.
Page 2 OEA. Remove the Table 4-10 and the introductory text. Errata to MPC750 UserÕs Manual operations. When parity generation is disabled, all parity checking should also be disabled and parity signals need not be connected.
Page 3 00 1110 00 1111 01 0000 All others MOTOROLA Errata to MPC750 UserÕs Manual Description Register holds current value. Counts processor cycles. Counts completed instructions. Does not include folded branches. Counts transitions from 0 to 1 of TBL bits speciÞed through MMRC0[RTCSELECT].
Page 4 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages.

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