Document type:
Title:
Revision date:
Revision:
User's Manual (MUT)
Mod. N957 8k Multi-Channel Analyzer
28/05/2012
6
NPO:
Filename:
Number of pages:
Page:
00105/04:N957x.MUTx/06 N957_REV6
35
16
2.10 Scaler and Timers
The board houses one 32 bit scaler and two 32 bit timers (named
Timer
and
Livetime
).
2.10.1 Scaler description
Scaler counts the ADC conversion.
The Scaler is controlled by the bit 0 of the Control Register:
-
Control Register <0> = 0: Scaler status: stop
-
Control Register <0> = 1: Scaler status: count
The Scaler is cleared by the following operation:
-
Dummy write access Software Clear register
-
Dummy write access Software Reset register
Scaler read operation description:
1. Dummy write access Timer Low register: this operation freeze the value of
Scaler L/H registers
2. Read the Scaler Low register: Scaler<15..0>
3. Read the Scaler High register: Scaler<31..16>
2.10.2 Timers description
Timer and Livetime input clock: 1 KHz
Timer is controlled by the bit 0 of the Control Register:
-
Control Register <0> = 0: Timer status: stop
-
Control Register <0> = 1: Timer status: count
Livetime is controlled by the bit 0 and 6 of the Control Register:
-
Control Register <0> = 0: Livetime status: stop
-
Control Register <0> = 1: Livetime status: enabled count
in Auto Gate mode (see Fig. 2.8):
-
Idle and Track status: count (if board is not full)
-
Settling, Digitisation and Clear status: stop
in External Gate mode (see Fig. 2.9):
-
Track and Settling status: count (if board is not full)
-
Idle, Digitisation and Clear status: stop
