ADUC7025BCPZ32-RL7 AD [Analog Devices], ADUC7025BCPZ32-RL7 Datasheet - Page 76

• Manufacturer Part Number: ADUC7025BCPZ32-RL7
• Description: Precision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI MCU
• Manufacturer: AD [Analog Devices]

ADuC7019/20/21/22/24/25/26/27
Timer0 (RTOS Timer)
Timer0 is a general-purpose, 16-bit timer (count-down) with a
programmable prescaler (see Figure 63). The prescaler source is
the core clock frequency (HCLK) and can be scaled by factors
of 1, 16, or 256.
Timer0’s interface consists of four MMRS: T0LD, T0VAL,
T0CON, and T0CLRI.
T0LD Register
Name
T0LD
T0LD is a 16-bit load register.
T0VAL Register
Name
T0VAL
T0VAL is a 16-bit read-only register representing the current
state of the counter.
T0CON Register
Name
T0CON
T0CON is the configuration MMR described in Table 74.
Table 74. T0CON MMR Bit Descriptions
Bit
31:8
7
6
5:4
3:2
1:0
HCLK
Value
00
01
10
11
PRESCALER
/1, 16 OR 256
Address
0xFFFF0300
Address
0xFFFF0304
Address
0xFFFF0308
Figure 63. Timer0 Block Diagram
Description
Reserved.
Timer0 Enable Bit. Set by user to enable Timer0.
Cleared by user to disable Timer0 by default.
Timer0 Mode. Set by user to operate in
periodic mode. Cleared by user to operate in
free-running mode. Default mode.
Reserved.
Prescale.
Core Clock/1. Default value.
Core Clock/16.
Core Clock/256.
Undefined. Equivalent to 00.
Reserved.
COUNTER
TIMER0
VALUE
DOWN
16-BIT
16-BIT
LOAD
Default Value
0x0000
Default Value
0xFFFF
Default Value
0x0000
TIMER0 IRQ
ADC CONVERSION
Access
R/W
Access
R
Access
R/W
Rev. A | Page 76 of 92
T0CLRI Register
Name
T0CLRI
T0CLRI is an 8-bit register. Writing any value to this register
clears the interrupt.
Timer1 (General-Purpose Timer)
Timer1 is a general-purpose, 32-bit timer (count down or count
up) with a programmable prescaler. The source can be the
32 kHz external crystal, the core clock frequency, or an external
GPIO, P1.0 or P0.6. This source can be scaled by a factor of 1,
16, 256, or 32768.
The counter can be formatted as a standard 32-bit value or as
Hours: Minutes: Seconds: Hundredths.
Timer1 has a capture register (T1CAP), which can be triggered
by a selected IRQ source initial assertion. This feature can be
used to determine the assertion of an event more accurately
than the precision allowed by the RTOS timer when the IRQ is
serviced.
Timer1 can be used to start ADC conversions as shown in the
block diagram in Figure 64.
32kHz OSCILLATOR
Timer1’s interface consists of five MMRS: T1LD, T1VAL,
T1CON, T1CLRI, and T1CAP.
T1LD Register
Name
T1LD
T1LD is a 16-bit load register.
T1VAL Register
Name
T1VAL
T1VAL is a 16-bit read-only register that represents the current
state of the counter.
T1CON Register
Name
T1CON
T1CON is the configuration MMR described in Table 75.
HCLK
P0.6
P1.0
Address
0xFFFF030C
Address
0xFFFF0320
Address
0xFFFF0324
Address
0xFFFF0328
Figure 64. Timer1 Block Diagram
IRQ[31:0]
PRESCALER
/1, 16, 256
OR 32768
Default Value
0xFF
Default Value
0x00000000
Default Value
0xFFFFFFFF
Default Value
0x0000
UP/DOWN
COUNTER
CAPTURE
32-BIT
32-BIT
LOAD
TIMER1
VALUE
TIMER1 IRQ
ADC CONVERSION
Access
W
Access
R/W
Access
R
Access
R/W