MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 518

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

External Bus Interface Module (EBI)
19.9.3 Show Strobe (SHS)
Technical Data
518
Figure 19-5. Internal (Show) Cycle Followed by External 1-Clock Read
A{22:0], TSIZ[1:0]
NOTE:
CLKOUT
CSE[1:0]
TA, TEA
EB[3:0]
D[31:0]
SHS
R/W
CS
OE
The PEPA and PCDPA bits in the ports must also be set to 1 to obtain
full visibility. The waveforms shown in
cycles.
The show strobe (SHS) pin provides an indication to an external device
(emulator or logic analyzer) when to latch address, TC[2:0], TSIZ[1:0],
R/W, CSE, PSTAT, and data from the external pins. The SHS pin is
enabled coming out of reset in emulation mode. In master mode, the
SHS pin may be enabled by writing to the port E pin assignment register
(PEPAR).
For any external cycle or show cycle, the SHS pin is driven low to
indicate valid address, TC, TSIZ, R/W, CSE, and PSTAT are present at
the pins, and driven back high to indicate valid data. The SHS pin is
driven low and back high only once per external bus cycle. See
Figure 19-5
Freescale Semiconductor, Inc.
For More Information On This Product,
External Bus Interface Module (EBI)
INTERNAL CYCLE
Go to: www.freescale.com
and
A1
Figure
SHOW
19-6.
D1
X1
EXTERNAL READ
DATA
A2
Figure 19-5
00
X2
D2
describe show
MMC2107 – Rev. 2.0
MOTOROLA