diff --git a/hw/application_fpga/core/timer/README.md b/hw/application_fpga/core/timer/README.md
index 34f8eb6..3e5440d 100644
--- a/hw/application_fpga/core/timer/README.md
+++ b/hw/application_fpga/core/timer/README.md
@@ -1,21 +1,20 @@
 # timer
-Timer with prescaler and support for free running mode.
+Timer with prescaler and support for detecting when a target time has
+been reached.w
 
 ## Introduction
-This core implements a simple timer with a prescaler and support for a
-free running mode.
+This core implements a simple timer with a prescaler and ability to
+signal when a given time has been reached.
 
-The prescaler allows measurement of time durations rather than
+The prescaler allows measurement of time duration rather than
 cycles. If for example setting the prescaler to the clock frequency in
-Hertz, the timer will count seconds. After (prescaler * timer) number
-of cycles the timer will stop. Checking status of the timer can be
-done by reading the STATUS_RUNNING_BIT. If set to zero, the timer has
-completed.
+Hertz, the timer will count seconds.
 
-If the free running mode is set (default off), the counter will not
-stpp when the number of cycles defined by (prescaler * timer) has been
-reached. Instead the timer continues until the CTRL_STOP_BIT is
-asserted.
+When started the timer will set the STATUS_RUNNING_BIT. The timer will
+not stop until the CTRL_STOP has been asserted.
+
+When timer has been started, after the set (prescaler * timer) number
+of cycles, the timer will set the STATUS_REACHED bit.
 
 ## API
 The following addresses define the API for the timer:
@@ -27,15 +26,12 @@ The following addresses define the API for the timer:
 
 	ADDR_STATUS:        0x09
 	STATUS_RUNNING_BIT: 0
+	STATUS_REACHED:     1
 
 	ADDR_PRESCALER:     0x0a
 	ADDR_TIMER:         0x0b
-
-	ADDR_FREE_RUNNING:  0x0c
-	FREE_RUNNING_BIT    0
-
 ```
 
 ADDR_PRESCALER and ADDR_TIMER registers should be set to a
-non-negative value. Default values for the these registers are one (1).
+non-zero value. Default values for the these registers are one (1).
 Note that these registers can't be changed when the timer is running.