sle44xx: extend the README for the SLE4442 captures

[sigrok-dumps.git] / sle44xx / sle4442 / README

diff --git a/sle44xx/sle4442/README b/sle44xx/sle4442/README
index 7930c4040fded4f983af2ea54925cfe2e36db265..b39d8ac2b19b5e0806e67c6f5e24d45b6f9932ad 100644 (file)
--- a/sle44xx/sle4442/README
+++ b/sle44xx/sle4442/README
@@ -2,7 +2,9 @@
 Siemens SLE4442 Chip Card protocol capture
 -------------------------------------------------------------------------------
 
-This is a collection of reader-card communication dumps.
+See the parent directory for more general information. These captures
+correspond to the SLE4442 chip. Each file demonstrates an individual
+operation.
 
 
 Logic analyzer setup
@@ -12,27 +14,41 @@ The logic analyzer used was a Cypress FX2 no-brand device (at 500kHz):
 
   Probe       SLE4442 pin
   -----------------------
-  1           I/O
-  2           CLK
-  3           RST
+  0           I/O
+  1           CLK
+  2           RST
 
 
 sle4442_atr.sr
 --------------
-ATR issued by reader and response by card
+
+Reset issued by the reader, ATR (Answer to Reset) response sent by the card.
+
 
 sle4442_psc_correct.sr
 ----------------------
-Reader reset, PSC sent by reader to the card and accepted
+
+Reader reset, correct PSC (Programmable Security Code) sent by the reader to
+the card, and gets accepted.
+
 
 sle4442_psc_wrong.sr
 --------------------
-Reader reset, PSC sent by reader to the card and refused
+
+Reader reset, incorrect PSC sent by the reader to the card, and gets refused.
+
 
 sle4442_read_main_memory.sr
 ---------------------------
-Full read of main memory
+
+Full read of the card's main memory (complete address range). Includes the
+ATR content at offset 0.
+
 
 sle4442_write_cafe1337_offset_30.sr
 -----------------------------------
-Write 0xCA 0xFE 0x13 0x37 to main memory at offset 0x30, then main memory read
+
+Write 0xCA 0xFE 0x13 0x37 to main memory at offset 0x30, then read back
+several main memory regions (starting slightly before the recently written
+address range, and starting from the beginning of the card's memory). Each
+read continues to the end of the card's capacity.