MC9S08RD32CFJE Freescale Semiconductor, MC9S08RD32CFJE Datasheet - Page 70

• Manufacturer Part Number: MC9S08RD32CFJE
• Description: IC MCU 32K FLASH 8MHZ 32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08RD32CFJE

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Resets, Interrupts, and System Configuration
5.8.6
This register contains one read-only status flag, one write-only acknowledge bit, three read/write delay
selects, and three unimplemented bits, which always read 0.
1. See
2. t
70
RTICLKS
RTIS[2:0]
RTIACK
ext
Field
RTIE
RTIF
2:0
is based on the external clock source, resonator, or crystal selected by the ICG configuration. See
7
6
5
4
Table A-9
Reset
RTIS2:RTIS1:RTIS0
W
R
System Real-Time Interrupt Status and Control Register (SRTISC)
Real-Time Interrupt Flag — This read-only status bit indicates the periodic wakeup timer has timed out.
0 Periodic wakeup timer not timed out.
1 Periodic wakeup timer timed out.
Real-Time Interrupt Acknowledge — This write-only bit is used to acknowledge real-time interrupt request
(write 1 to clear RTIF). Writing 0 has no meaning or effect. Reads always return 0.
Real-Time Interrupt Clock Select — This read/write bit selects the clock source for the real-time interrupt.
0 Real-time interrupt request clock source is internal 1-kHz oscillator.
1 Real-time interrupt request clock source is external clock.
Real-Time Interrupt Enable — This read-write bit enables real-time interrupts.
0 Real-time interrupts disabled.
1 Real-time interrupts enabled.
Real-Time Interrupt Period Selects — These read/write bits select the wakeup period for the RTI. One clock
source for the real-time interrupt is its own internal clock source, which oscillates with a period of approximately
t
frequency divided by value in RTIS2:RTIS1:RTIS0. See
RTI
t
RTI
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
RTIF
and is independent of other MCU clock sources. Using an external clock source the delays will be crystal
0
7
in
Appendix A, “Electrical
Figure 5-8. System RTI Status and Control Register (SRTISC)
= Unimplemented or Reserved
RTIACK
6
0
0
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
Table 5-8. SRTISC Field Descriptions
Table 5-9. Real-Time Interrupt Period
RTICLKS
Characteristics,” for the tolerance on these values.
Disable periodic wakeup timer
0
5
Internal Clock Source
(t
RTI
= 1 ms, Nominal)
128 ms
256 ms
512 ms
1.024 s
32 ms
64 ms
RTIE
8 ms
4
0
Description
Table
(1)
0
0
3
5-9.
RTIS2
Disable periodic wakeup timer
2
0
External Clock Source
Period = t
t
t
t
ext
t
t
t
ex
t
ext
ex
ex
ex
Freescale Semiconductor
ext
RTIS1
x 32768
x 16384
x 1024
x 2048
x 4096
x 8192
Table A-9
x 256
0
1
ext
for details.
RTIS0
(2)
0
0