LRS1383 View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'LRS1383' PDF : 114 Pages View PDF
FUM00701
50
Table 14. Read Configuration Register Definition
RM
R
FC2
FC1
FC0
R
DOC
WC
15
14
13
12
11
10
9
8
BS
CC
R
R
BW
BL2
BL1
BL0
7
6
5
4
3
2
1
0
RCR.15 = READ MODE (RM)
• 0 = Synchronous Burst Reads Enabled
NOTES:
Read configuration register affects the read operations from
• 1 = Asynchronous Reads Enabled (Default)
main and parameter blocks. Read operations for status
RCR.14 = RESERVED FOR FUTURE ENHANCEMENTS register, query code, identifier codes, OTP block and device
(R)
configuration codes support single read cycles.
RCR.13-11 = FREQUENCY CONFIGURATION (FC2-0)
• 000 = Code 0 reserved for future use
RCR.14, RCR.10, RCR.5 and RCR.4 bits are reserved for
• 001 = Code 1 reserved for future use
• 010 = Code 2
• 011 = Code 3
• 100 = Code 4
• 101 = Code 5
• 110 = Code 6 reserved for future use
• 111 = Code 7 reserved for future use (Default)
future use.
Refer to Frequency Configuration in Section 4.16.2 for
information about the frequency configuration RCR.13-11.
Undocumented combinations of bits RCR.13-11 are reserved
by Sharp Corporation for future implementations and should
RCR.10 = RESERVED FOR FUTURE ENHANCEMENTS not be used.
(R)
RCR.9 = DATA OUTPUT CONFIGURATION (DOC)
Refer to Section 4.16.7 for information about Burst Wrap
• 0 = Hold Data for One Clock
• 1 = Hold Data for Two Clocks (Default)
configuration RCR.3.
RCR.8 = WAIT# CONFIGURATION (WC)
• 0 = WAIT# Asserted During Delay
• 1 = WAIT# Asserted One Data Cycle Before Delay
In the asynchronous page mode, the burst length always
equals 8 words.
(Default)
All the bits in the read configuration register are set to "1"
RCR.7 = BURST SEQUENCE (BS)
• 0 = Intel Burst Order
• 1 = Linear Burst Order (Default)
after power-up or device reset.
When the bit RCR.15 is set to "1", other bits are invalid.
RCR.6 = CLOCK CONFIGURATION (CC)
• 0 = Burst Starts and Data Output on Falling Clock Edge
• 1 = Burst Starts and Data Output on Rising Clock Edge
(Default)
RCR.5-4 = RESERVED FOR FUTURE ENHANCEMENTS
(R)
RCR.3 = BURST WRAP (BW)
• 0 = Wrap Burst Reads within Burst Length set
by RCR.2-0
• 1 = No Wrap Burst Reads within Burst Length set
by RCR.2-0 (Default).
RCR.2-0 = BURST LENGTH (BL2-0)
• 001 = 4 Word Burst
• 010 = 8 Word Burst
• 011 = Reserved for future use
• 111 = Continuous (Linear) Burst (Default)
Synchronous burst mode will be available for future device.
Appendix to Spec No.: MFM2-J13207 Model No.: LRS1383 March 1, 2001
Rev. 2.20
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