M68EVB908GB60E Freescale Semiconductor, M68EVB908GB60E Datasheet - Page 73

• Manufacturer Part Number: M68EVB908GB60E
• Description: BOARD EVAL FOR MC9S08GB60
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of M68EVB908GB60E

• Contents: Module and Misc Hardware
• Processor To Be Evaluated: MC9S08GB
• Data Bus Width: 8 bit
• Interface Type: RS-232
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08GB
• Kit Contents: GB60 Evaluation Kit
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08GB60
• Lead Free Status / RoHS Status: Lead free / RoHS 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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