MC9S08GT8ACFBE Freescale Semiconductor, MC9S08GT8ACFBE Datasheet - Page 76

• Manufacturer Part Number: MC9S08GT8ACFBE
• Description: IC MCU 8K FLASH 1K RAM 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08GT8ACFBE

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFP
• Processor Series: S08GT
• Core: HCS08
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: I2C/SCI/SPI
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 36
• Operating Supply Voltage: 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWS08
• Development Tools By Supplier: M68EVB908GB60E, M68DEMO908GB60E
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• For Use With: M68DEMO908GB60E - BOARD DEMO MC9S08GB60M68EVB908GB60E - BOARD EVAL FOR MC9S08GB60
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Resets, Interrupts, and System Configuration
5.7.6
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
2
76
RTICLKS
RTIS[2:0]
See
t
Reset
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
W
Table A-12
R
RTIS2:RTIS1:RTIS0
System Real-Time Interrupt Status and Control Register (SRTISC)
RTIF
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 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
0
7
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
t
RTI
and is independent of other MCU clock sources. Using an external clock source the delays will be crystal
in
= Unimplemented or Reserved
Appendix A, “Electrical
Figure 5-8. System RTI Status and Control Register (SRTISC)
RTIACK
0
0
6
Table 5-8. SRTISC Field Descriptions
RTICLKS
Table 5-9. Real-Time Interrupt Period
MC9S08GT16A/GT8A Data Sheet, Rev. 1
0
5
Characteristics,” for the tolerance on these values.
(t
Internal Clock Source
RTI
= 1.15 ms, Nominal)
1177.6 ms
RTIE
147.2 ms
294.4 ms
588.8 ms
18.4 ms
36.8 ms
73.6 ms
9.2 ms
0
4
Description
Table
1
3
0
0
5-9.
RTIS2
0
2
Disable periodic wakeup timer
External Clock Source
Period = t
t
t
t
ext
t
t
t
ex
t
ext
ex
ex
ex
Freescale Semiconductor
ext
RTIS
x 32768
x 16384
x 1024
x 2048
x 4096
x 8192
Table A-11
0
x 256
1
1
ext
for details.
RTIS
2
0
0
0