MC68908GZ8MFAE Freescale Semiconductor, MC68908GZ8MFAE Datasheet - Page 254

• Manufacturer Part Number: MC68908GZ8MFAE
• Description: IC MCU 8BIT 8K FLASH 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68908GZ8MFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: CAN, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 37
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• Processor Series: M689xx
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SPI, SCI, CAN
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 37
• Number Of Timers: 2
• Operating Supply Voltage: 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, M68CBL05AE, DEMO908GZ60E, M68EML08GZE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Timebase Module (TBM)
18.7 Timebase Control Register
The timebase has one register, the timebase control register (TBCR), which is used to enable the
timebase interrupts and set the rate.
TBIF — Timebase Interrupt Flag
TBR2–TBR0 — Timebase Divider Selection Bits
TACK— Timebase Acknowledge Bit
TBIE — Timebase Interrupt Enabled Bit
TBON — Timebase Enabled Bit
254
This read-only flag bit is set when the timebase counter has rolled over.
These read/write bits select the tap in the counter to be used for timebase interrupts as shown in
Table
The TACK bit is a write-only bit and always reads as 0. Writing a logic 1 to this bit clears TBIF, the
timebase interrupt flag bit. Writing a logic 0 to this bit has no effect.
This read/write bit enables the timebase interrupt when the TBIF bit becomes set. Reset clears the
TBIE bit.
This read/write bit enables the timebase. Timebase may be turned off to reduce power consumption
when its function is not necessary. The counter can be initialized by clearing and then setting this bit.
Reset clears the TBON bit.
1 = Timebase interrupt pending
0 = Timebase interrupt not pending
1 = Clear timebase interrupt flag
0 = No effect
1 = Timebase interrupt is enabled.
0 = Timebase interrupt is disabled.
1 = Timebase is enabled.
0 = Timebase is disabled and the counter initialized to 0s.
18-1.
Address: $001C
Do not change TBR2–TBR0 bits while the timebase is enabled
(TBON = 1).
Reset:
Read:
Write:
Bit 7
TBIF
0
Figure 18-2. Timebase Control Register (TBCR)
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
= Unimplemented
TBR2
6
0
TBR1
5
0
NOTE
TBR0
4
0
TACK
3
R
0
0
= Reserved
TBIE
2
0
TBON
1
0
Freescale Semiconductor
Bit 0
R
0