DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 273

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Freescale Semiconductor
Application:
Timer Control/Status Register TCSR0:$FFFF8F Read/Write
Timers
23 22 21 20
Reset = $000000
Data Output Bit 13
0 = Zero written to TIO pin
1 = One written to TIO pin
Prescaled Clock Enable Bit 15
0 = Clock source is CLK/2 or TIO
1 = Clock source is prescaler output
Timer Compare Flag Bit 21
0 = “1” has been written to TCSR(TCF),
or timer compare interrupt serviced
1 = Timer Compare has occurred
Timer Overflow Flag Bit 20
0 = “1” has been written to TCSR(TOF),
or timer Overflow interrupt serviced
1 = Counter wraparound has occurred
*
0
Timer Reload Mode Bit 9
0 = Timer operates as a free
running counter
1 = Timer is reloaded when
selected condition occurs
Data Input Bit 12
0 = Zero read on TIO pin
1 = One read on TIO pin
Direction Bit 11
0 = TIO pin is input
1 = TIO pin is output
*
0
TCF
TOF
19 18 17 16
Figure B-20. Timer Control/Status Register (TCSR)
*
0
*
0
Inverter Bit 8
0 = 0- to-1 transitions on TIO input increment the counter,
or high pulse width measured, or high pulse output on TIO
1 = 1-to-0 transitions on TIO input increment the counter,
or low pulse width measured, or low pulse output on TIO
*
0
*
0
DSP56303 User’s Manual, Rev. 2
15 14 13 12 11 10 9
PCE
TCSR1:$FFFF8B Read/Write
TCSR2:$FFFF87 Read/Write
*
0
DO
DI
DIR
*
0
Timer Compare Interrupt Enable Bit 2
0 = Compare Interrupts Disabled
1 = Compare Interrupts Enabled
TC (3:0)
TRM INV
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Timer Overflow Interrupt Enable Bit 1
0 = Overflow Interrupts Disabled
1 = Overflow Interrupts Enabled
8
Timer Control Bits 4–7 (TC[3–0])
Output
Output
Output
Output
Output
GPIO
TC3
Input
Input
Input
Input
TIO
7
–
–
–
–
–
–
*
TC2
Date:
Programmer:
6
= Reserved, Program as 0
External
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Internal
Clock
TC1
5
–
–
–
–
–
–
TC0
4
Timer
Timer Pulse
Timer Toggle
Event Counter
Input Width
Input Period
Capture
Pulse Width Modulation
Reserved
Watchdog Pulse
Watchdog Toggle
Reserved
Reserved
Reserved
Reserved
Reserved
Timer Enable Bit 0
0 = Timer Disabled
1 = Timer Enabled
*
0
3
Mode
Programming Sheets
TCIE TQIE
Sheet 2 of 3
2
1
TE
0
B-29