Motorola MPC823e User Manual

External Bus Interface
MOTOROLA MPC823e REFERENCE MANUAL 13-41
EXTERNAL BUS
13
INTERFACE
remote bus supports aborted cycles. The failure of the stwcx instruction is reported to
the core.
13.4.11 Exception Control Cycles
The MPC823e bus architecture requires the TA signal to be asserted from an external
device to indicate that the bus cycle is complete. TA
is not asserted when one of the
following conditions occur:
• The external device does not respond
• Other application-dependent errors occur
Figure 13-27. Reservation On Multilevel Bus Hierarchy
S
R
LOCAL BUS
INTERFACE
BUS
INTERFACE
Q
KR
MPC823e EXTERNAL BUS
MPC823e
AT[0:3], RSV, R/W, TS
A[6:31]
REMOTE BUS
MASTER IN THE REMOTE
BUS WRITES TO THE
RESERVED LOCATION
EXTERNAL DEVICE

Motorola MPC823e Specifications

General

Brand	Motorola
Model	MPC823e
Category	Computer Hardware
Language	English