ST10F269-T3 STMicroelectronics, ST10F269-T3 Datasheet - Page 101

• Manufacturer Part Number: ST10F269-T3
• Manufacturer: STMicroelectronics

Specifications of ST10F269-T3

• Cpu Family: ST10
• Device Core Size: 16b
• Frequency (max): 32MHz
• Interface Type: ASC/I2C/SSC
• Program Memory Type: Flash
• Program Memory Size: 256KB
• Total Internal Ram Size: 12KB
• # I/os (max): 111
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 16-chx10-bit
• Instruction Set Architecture: CISC/RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: TQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

16.1.2 - RTCPH & RTCPL: RTC PRESCALER Registers
The 20-bit programmable prescaler divider is loaded with 2 registers.
The 4 most significant bit are stored into RTCPH and the 16 Less significant bit are stored in RTCPL. In
order to keep the system clock, those registers are not reset.
They are write protected by bit RTOFF of RTCCON register, write operation is allowed if RTOFF is set.
RTCPL (EC06h)
RTCPH (EC08h)
Figure 52 : PRESCALER Register
The value stored into RTCPH, RTCPL is called RTCP (coded on 20-bit). The dividing ratio of the
Prescaler divider is: ratio = 64 x (RTCP)
16.1.3 - RTCDH & RTCDL: RTC DIVIDER Counters
Every basic reference clock the DIVIDER counters are reloaded with the value stored RTCPH and
RTCPL registers. To get an accurate time measurement it is possible to read the value of the DIVIDER,
reading the RTCDH, RTCDL. Those counters are read only. After any bit changed in the programmable
PRESCALER register, the new value is loaded in the DIVIDER.
RTCDL (EC0Ah)
RTCDH (EC0Ch)
Note: Those registers are not reset, and are read only.
15
15
15
15
3
19 18 17 16
14
14
14
14
2
RTCPH
1
13
13
13
13
0
12
12
12
12
15 14 13 12
11
11
11
11
15 14 13 12
RESERVED
RESERVED
10
10
10
10
9
9
9
9
11 10 9
20 bit word counter
11 10 9
8
8
8
8
RTCPL
RTCDL
XBUS
XBUS
XBUS
XBUS
RW
R
7
7
7
7
8
8
RTCPL
7
6
6
6
6
7
6
6
5
5
5
5
5
5
4
4
4
4
4
4
3
3
3
3
3
3
2
Reset Value: XXXXh
Reset Value: XXXXh
2
Reset Value: ---Xh
Reset Value: ---Xh
1
2
2
2
2
RTCPH
RTCDH
ST10F269-T3
1
RW
0
R
0
1
1
1
1
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0
0
0
0