ST10F269-DP STMicroelectronics, ST10F269-DP Datasheet - Page 102

• Manufacturer Part Number: ST10F269-DP
• Description: MCU 16BIT 256K FLASH 144PQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F269-DP

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 144-BFQFP
• Processor Series: ST10F26x
• Core: ST10
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No

ST10F269
When RTCD increments to reach 00000h, The 20-bit word stored into RTCPH, RTCPL registers is loaded
in RTCD.
Figure 53 : DIVIDER Counters
Bit 15 to bit 4 of RTCPH and RTCDH are not used. When reading, the return value of those bit will be
zeros.
16.1.4 - RTCH & RTCL: RTC Programmable COUNTER Registers
The RTC has 2 x 16-bit programmable counters which count rate is based on the basic time reference (for
example 1 second). As the clock oscillator may be kept working, even in power down mode, the RTC
counters may be used as a system clock. In addition RTC counters and registers are not modified at any
system reset. The only way to force their value is to write them via the XBUS.
Those counters are write protected as well. The bit RTOFF of the RTCCON register must be set (RTC
dividers and counters are stopped) to enable a write operation on RTCH or RTCL.
A write operation on RTCH or RTCL register loads directly the corresponding counter. When reading, the
current value in the counter (system date) is returned.
The counters keeps on running while the clock oscillator is working.
RTCL (EC0Eh)
RTCH (EC10h)
Note: Those registers are nor reset
102/160
15
15
3
19 18 17 16
14
14
2
RTCDH
1
13
13
0
12
12
15 14 13 12
11
11
15 14 13 12
20 bit word internal value of the prescalar divider
10
10
9
9
11 10 9
11 10 9
8
8
XBUS
XBUS
RTCH
RTCL
RW
RW
7
7
8
8
RTCDL
7
6
6
7
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
Reset Value: XXXXh
Reset Value: XXXXh
2
1
2
2
1
0
0
1
1
0
0