MC9S08GT16CFB Freescale Semiconductor, MC9S08GT16CFB Datasheet - Page 73

• Manufacturer Part Number: MC9S08GT16CFB
• Manufacturer: Freescale Semiconductor

Specifications of MC9S08GT16CFB

• Cpu Family: HCS08
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SCI/SPI
• Program Memory Type: Flash
• Program Memory Size: 16KB
• Total Internal Ram Size: 1KB
• # I/os (max): 36
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 2.08V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

ID[11:0] — Part Identification Number
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.
RTIF — Real-Time Interrupt Flag
RTIACK — Real-Time Interrupt Acknowledge
RTICLKS — Real-Time Interrupt Clock Select
RTIE — Real-Time Interrupt Enable
RTIS2:RTIS1:RTIS0 — Real-Time Interrupt Period Selects
Freescale Semiconductor
Each derivative in the HCS08 Family has a unique identification number. The MC9S08GB/GT is hard
coded to the value $002.
This read-only status bit indicates the periodic wakeup timer has timed out.
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.
This read/write bit selects the clock source for the real-time interrupt.
This read-write bit enables real-time interrupts.
These read/write bits select the wakeup period for the RTI. The clock source for the real-time interrupt
is its own clock source, which oscillates with a period of approximately 1/f
other MCU clock sources. Using an external clock source, the delays will be crystal frequency divided
by value in RTIS2:RTIS1:RTIS0.
1 = Periodic wakeup timer timed out.
0 = Periodic wakeup timer not timed out.
1 = Real-time interrupt request clock source is external clock.
0 = Real-time interrupt request clock source is internal oscillator.
1 = Real-time interrupts enabled.
0 = Real-time interrupts disabled.
System Real-Time Interrupt Status and Control Register (SRTISC)
Reset:
Read:
Write:
Figure 5-7. System RTI Status and Control Register (SRTISC)
RTIF
Bit 7
0
= Unimplemented or Reserved
RTIACK
MC9S08GB/GT Data Sheet, Rev. 2.3
6
0
0
RTICLKS
5
0
Reset, Interrupt, and System Control Registers and Control Bits
RTIE
4
0
3
0
0
RTIS2
2
0
ext
, and it is independent of
RTIS1
1
0
RTIS0
Bit 0
0
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