aboutsummaryrefslogtreecommitdiffstats
path: root/picosoc/README.md
diff options
context:
space:
mode:
authorClifford Wolf <clifford@clifford.at>2017-09-15 14:47:50 +0200
committerClifford Wolf <clifford@clifford.at>2017-09-15 14:47:50 +0200
commit48b13daef2c83fd4b4f603de42f3b0f7ce697622 (patch)
tree83d487accd9e0a21b87024e9b4c32b29a60c55c9 /picosoc/README.md
parenta412d3ea69618960d6cfd900b5b4e99a9161992f (diff)
downloadpicorv32-48b13daef2c83fd4b4f603de42f3b0f7ce697622.tar.gz
picorv32-48b13daef2c83fd4b4f603de42f3b0f7ce697622.zip
Update picosoc memory map
Diffstat (limited to 'picosoc/README.md')
-rw-r--r--picosoc/README.md3
1 files changed, 3 insertions, 0 deletions
diff --git a/picosoc/README.md b/picosoc/README.md
index 77ea038..2fd558c 100644
--- a/picosoc/README.md
+++ b/picosoc/README.md
@@ -38,6 +38,9 @@ and upload them to a connected iCE40-HX8K Breakout Board.
| 0x02000008 .. 0x0200000B | UART Send/Recv Data Register |
| 0x03000000 .. 0xFFFFFFFF | Memory mapped user peripherals |
+The addresses in the internal SRAM region beyond the end of the physical
+SRAM map to the corresponding addresses in serial flash.
+
Reading from the UART Send/Recv Data Register will return the last received
byte, or -1 (all 32 bits set) when the receive buffer is empty.