dspic33fj128mc204 Microchip Technology Inc., dspic33fj128mc204 Datasheet - Page 298
dspic33fj128mc204
Manufacturer Part Number
dspic33fj128mc204
Description
High-performance, 16-bit Digital Signal Controllers
Manufacturer
Microchip Technology Inc.
Datasheet
1.DSPIC33FJ128MC204.pdf
(412 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
dspic33fj128mc204-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Company:
Part Number:
dspic33fj128mc204-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Company:
Part Number:
dspic33fj128mc204T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- Current page: 298 of 412
- Download datasheet (6Mb)
25.1
The RTCC module registers are organized into three
categories:
• RTCC Control Registers
• RTCC Value Registers
• Alarm Value Registers
25.1.1
To limit the register interface, the RTCC Timer and
Alarm Time registers are accessed through corre-
sponding register pointers. The RTCC Value register
window (RTCVALH and RTCVALL) uses the RTCPTR
bits (RCFGCAL<9:8>) to select the desired timer
register pair (see Table 25-1).
By writing the RTCVALH byte, the RTCC Pointer value,
RTCPTR<1:0> bits, decrement by one until they reach
‘00’. Once they reach ‘00’, the MINUTES and
SECONDS value will be accessible through RTCVALH
and RTCVALL until the pointer value is manually
changed.
TABLE 25-1:
The Alarm Value register window (ALRMVALH and
ALRMVALL)
(ALCFGRPT<9:8>) to select the desired Alarm register
pair (see Table 25-2).
EXAMPLE 25-1:
DS70291C-page 296
RTCPTR
<1:0>
MOV
MOV
MOV
MOV
MOV
BSET
00
01
10
11
RTCC Module Registers
REGISTER MAPPING
#NVMKEY, W1
#0x55, W2
#0xAA, W3
W2, [W1]
W3, [W1]
RCFGCAL, #13
uses
RTCVAL<15:8>
RTCVAL REGISTER MAPPING
RTCC Value Register Window
WEEKDAY
MINUTES
MONTH
SETTING THE RTCWREN BIT
—
the
ALRMPTR
RTCVAL<7:0>
;move the address of NVMKEY into W1
;start 55/AA sequence
;set the RTCWREN bit
SECONDS
HOURS
YEAR
DAY
Preliminary
bits
By writing the ALRMVALH byte, the Alarm Pointer
value, ALRMPTR<1:0> bits, decrement by one until
they reach ‘00’. Once they reach ‘00’, the ALRMMIN
and ALRMSEC value will be accessible through
ALRMVALH and ALRMVALL until the pointer value is
manually changed.
TABLE 25-2:
Considering that the 16-bit core does not distinguish
between 8-bit and 16-bit read operations, the user must
be aware that when reading either the ALRMVALH or
ALRMVALL bytes will decrement the ALRMPTR<1:0>
value. The same applies to the RTCVALH or RTCVALL
bytes with the RTCPTR<1:0> being decremented.
25.1.2
In order to perform a write to any of the RTCC Timer
registers, the RTCWREN bit (RCFGCAL<13>) must be
set (refer to Example 25-1).
ALRMPTR
Note:
Note:
<1:0>
00
01
10
11
This only applies to read operations and
not write operations.
WRITE LOCK
To avoid accidental writes to the timer, it is
recommended that the RTCWREN bit
(RCFGCAL<13>) is kept clear at any
other time. For the RTCWREN bit to be
set, there is only 1 instruction cycle time
window allowed between the 55h/AA
sequence and the setting of RTCWREN;
therefore, it is recommended that code
follow the procedure in Example 25-1.
ALRMVAL<15:8> ALRMVAL<7:0>
ALRMVAL REGISTER
MAPPING
Alarm Value Register Window
ALRMMNTH
ALRMMIN
ALRMWD
© 2009 Microchip Technology Inc.
—
ALRMSEC
ALRMDAY
ALRMHR
—
Related parts for dspic33fj128mc204
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 128KB FL 16KB RAM 60MHz 28Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 28Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 128KB FL 16KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 28Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 128KB FL 16KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 256KB FL32KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 28Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 128KB FL 16KB RAM 60MHz 28Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 44Pin
Manufacturer:
Microchip Technology
Part Number:
Description:
Digital Signal Processors & Controllers - DSP, DSC 32KB FL 4KB RAM 60MHz 28Pin
Manufacturer:
Microchip Technology