Nordic Semiconductor ASA
Tel.: +47 72 89 89 00
Fax: +47 72 89 89 89
Reg. nr./VAT no.: 966011726
Template ID: 1159140_112, rev. 1.0, date: 2006-01-05 Page 1 of 3
Template approved by ERO
Product Anomaly Notification (PAN)
Device affected (product name)
:
nRF24LU1P-F16Q32
nRF24LU1P-F32Q32
Device version(s) affected
:
Build code AX and A
Date (YYYY-MM-DD):
2008-10-17
PAN n
011
Nordic Semiconductor reference:
Thomas Embla Bonnerud
Document version
:
1.0
Summary
Anomalies:
1. Flash memory read back via SPI hold time violated
2. USB data corruption for certain use cases
Marking / tracing:
Affected devices:
N R F A X
2 4 L U 1 P
- - - - - -
Authorization for Nordic Semiconductor
Product Manager
Thomas Embla Bonnerud
Date
2008.10.17
Sign:
Nordic Semiconductor ASA
Tel.: +47 72 89 89 00
Fax: +47 72 89 89 89
Reg. nr./VAT no.: 966011726
Product: nRF24LU1P Date:2008-10-17 Page 2 of 3
Detailed Description
Anomaly #1
Symptoms:
When verifying Flash content, the specified hold time is violated for the last bit in each byte.
This bit will only be held for a short time after the positive edge of SSCK, not until the negative edge as
specified. The hold time after the positive edge of SSCK is typically in the order of 20-40ns.
Conditions:
Will happen for any Flash SPI READ command, which requires too long hold time.
Consequences:
Bit 0 of spidata read may be corrupted.
Workaround:
External SPI masters should have minimal SMISO hold time versus posedge SSCK requirement. A value of
< 15ns will be acceptable for small loads on SMISO, for larger loads larger hold times are accepted.