S912XEP100J5MAGR Freescale Semiconductor, S912XEP100J5MAGR Datasheet - Page 263
S912XEP100J5MAGR
Manufacturer Part Number
S912XEP100J5MAGR
Description
S912XEP Series 16 Bit 50 Mhz 1 MB Flash 64 KB Ram Microcontroller - LQFP-144
Manufacturer
Freescale Semiconductor
Datasheet
1.S912XEP100J5MAG.pdf
(1328 pages)
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5.5.2.2
This mode is used for emulation systems in which the target application is operating in normal expanded
mode.
If the external bus is used with a PRU, the external device rebuilds the data select and data direction signals
UDS, LDS, RE, and WE from the ADDR0, LSTRB, and RW signals.
Figure 5-6
The timings of accesses with 1 stretch cycle are shown in
The associated timing numbers are given in
Freescale Semiconductor
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
•
•
•
•
ECLKX2 rising edges have the same timing as ECLK edges.
The timing for accesses to PRU registers, which take 2 cycles to complete, is the same as the timing
for an external non-PRR access with 1 cycle of stretch as shown in example 2b.
Figure ‘Example 2b: Emulation Expanded Mode — Read with 1 Stretch Cycle’
Figure ‘Example 2b: Emulation Expanded Mode — Write with 1 Stretch Cycle’
shows the PRU connection with the available external bus signals in an emulator application.
Example 2b: Emulation Expanded Mode
ADDR[22:20]/ACC[2:0]
ADDR[22:0]/IVD[15:0]
Figure 5-6. Application in Emulation Expanded Mode
S12X_EBI
MC9S12XE-Family Reference Manual Rev. 1.23
ADDR[19:16]/
IQSTAT[3:0]
DATA[15:0]
ECLKX2
CS[3:0]
LSTRB
EWAIT
ECLK
RW
EMULMEM
PRU
Emulator
PRR
UDS
LDS
WE
RE
Chapter 5 External Bus Interface (S12XEBIV4)
Ports
263
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