ST10F269Z2 STMicroelectronics, ST10F269Z2 Datasheet - Page 110

• Manufacturer Part Number: ST10F269Z2
• Description: 16-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST10F269Z2

• Single Voltage Supply: 5V ±10% (EMBEDDED REGULATOR FOR 2.7 or 3.3 V CORE SUPPLY).
• Temperature Ranges: -40 +125 °C / -40 to 85 °C

16 - REAL TIME CLOCK
16.1.5 - RTCAH & RTCAL: RTC ALARM Registers
When the programmable counters reach the 32-bit value stored into RTCAH & RTCAL registers, an alarm
is triggered and the interrupt request RTAIR is generated. Those registers are not protected.
RTCAL (EC12h)
RTCAH (EC14h)
Note: Those registers are not reset
16.2 - Programming the RTC
RTC interrupt request signals are connected to Port2, pad 10 (RTCSI) and pad 11 (RTCAI). An alternate
function Port2 is to generate fast interrupts firq[7:0]. To trigger firq[2] and firq[3] the following configuration
has to be set.
EXICON ESFR controls the external interrupt edge selection, RTC interrupt requests are rising edge
active.
EXICON (F1C0h)
Notes: 1. EXI2ES and EXI3ES must be configured as "01b" because RCT interrupt request lines are rising edge active.
EXISEL ESFR enables the Port2 alternate sources. RTC interrupts are alternate sources 2 and 3.
EXISEL (F1DAh)
Notes: 1. Advised configuration.
110/184
EXIxSS
15
15
15
15
EXI7ES
EXI7SS
RW
RW
2. Alarm interrupt request line (RTCAI) is linked with EXI3ES.
3. Timed interrupt request line (RTCSI) is linked with EXI2ES.
2. Alarm interrupt request (RTCAI) is linked with EXI3SS.
3. Timed interrupt request (RTCSI) is linked with EXI2SS.
14
14
14
14
13
13
13
13
EXI6ES
EXI6SS
External Interrupt x Source Selection (x=7...0)
‘00’: Input from associated Port 2 pin.
‘01’: Input from “alternate source”.
‘10’: Input from Port 2 pin ORed with “alternate source”.
‘11’: Input from Port 2 pin ANDed with “alternate source”.
RW
RW
12
12
12
12
11
11
11
11
EXI5ES
EXI5SS
RW
RW
10
10
10
10
9
9
9
9
EXI4ES
EXI4SS
RW
RW
1
8
8
8
8
RTCAH
RTCAL
XBUS
XBUS
ESFR
ESFR
RW
RW
EXI3ES
7
7
7
7
EXI3SS
RW
RW
1 2
6
6
6
6
2
1
EXI2ES
5
5
5
5
EXI2SS
RW
RW
1 3
4
4
4
4
3
3
3
3
3
EXI1ES
EXI1SS
RW
RW
Reset Value: XXXXh
Reset Value: XXXXh
Reset Value: 0000h
Reset Value: 0000h
2
2
2
2
ST10F269
1
1
1
1
EXI0ES
EXI0SS
RW
RW
0
0
0
0