MPC8536-RDK Freescale Semiconductor, MPC8536-RDK Datasheet - Page 726

Manufacturer Part Number

BOARD REF COMEXPRESS MPC8536

Manufacturer

Freescale Semiconductor

PowerQUICC ™r

CSB1880, CSB1801, Cables, Documentation, Enclosure, Power Supply with cord

For Use With/related Products

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Enhanced Local Bus Controller

If BRn[MSEL] of the accessed bank selects a UPM on the currently requested cycle, the UPM manipulates

the LCSn for that bank with timing as specified in the UPM RAM word CSTn fields. The selected UPM

affects only the assertion and negation of the appropriate LCSn signal. The state of the selected LCSn

signal of the corresponding bank depends on the value of each CSTn bit.

control LCSn signals.

If BRn[MSEL] of the accessed memory bank selects a UPM on the currently requested cycle, the selected

UPM affects the assertion and negation of the appropriate LBS[0:3] signal. The timing of all four

byte-select signals is specified in the RAM word. However, LBS[0:3] are also controlled by the port size

of the accessed bank, the number of bytes to transfer, and the address accessed.

UPMs control LBS[0:3].

Chip-Select Signal Timing (CST n )

Byte Select Signal Timing (BST n )

MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1

signal timing set in the RAM word is applied to the current (and last) cycle. However, if the

disable timer is activated and the next access is to the same bank, execution of the next UPM

pattern is held off and the control signal values specified in the last word are extended in

duration for the number of clock cycles specified in M x MR[DS n ].

0 The UPM continues executing RAM words.

1 Indicates the last RAM word in the program. The service to the UPM request is done after

In case of UPM writes, program UTA and LAST in same RAM word.

In case of UPM reads, program UTA and LAST in consecutive or same RAM words.

Last word. When LAST is read in a RAM word, the current UPM pattern terminates and control

this cycle concludes.

Table 13-40. RAM Word Field Descriptions (continued)

Figure 13-67. LCS n Signal Selection

Bank Selected

Figure 13-67

Figure 13-68

Freescale Semiconductor

shows how UPMs