MC68HC908GT8CFB Freescale Semiconductor, MC68HC908GT8CFB Datasheet - Page 260

• Manufacturer Part Number: MC68HC908GT8CFB
• Description: IC MCU 8K FLASH 8MHZ 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GT8CFB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 34
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Electrical Specifications
20.8 5-V Control Timing
20.9 3-V Control Timing
260
Internal operating frequency
Internal clock period (1/f
RST input pulse width low
IRQ interrupt pulse width low (edge-triggered)
IRQ interrupt pulse period
Internal operating frequency
Internal clock period (1/f
RST input pulse width low
IRQ interrupt pulse width low (edge-triggered)
IRQ interrupt pulse period
1. V
2. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 t
1. V
2. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 t
noted.
noted.
DD
DD
= 4.5 to 5.5 Vdc, V
= 2.7 to 3.3 Vdc, V
RST
RST
IRQ
IRQ
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
OP
OP
Characteristic
Characteristic
)
SS
)
SS
= 0 Vdc, T
= 0 Vdc, T
A
A
Figure 20-1. RST and IRQ Timing
Figure 20-2. RST and IRQ Timing
(1)
(1)
= T
= T
L
L
to T
to T
t
t
t
t
ILIH
ILIH
RL
RL
H
H
; timing shown with respect to 20% V
; timing shown with respect to 20% V
t
t
ILIL
ILIL
f
f
Symbol
Symbol
OP
OP
t
t
t
t
t
t
t
t
ILIH
ILIH
ILIL
ILIL
cyc
cyc
(f
RL
(f
RL
Bus
Bus
)
)
Note
Note
Min
Min
122
244
125
125
50
50
—
—
DD
DD
(2)
(2)
and 70% V
and 70% V
Freescale Semiconductor
cyc
cyc
Max
Max
—
—
—
—
—
—
—
—
8
4
DD
SS
.
.
, unless otherwise
, unless otherwise
MHz
MHz
Unit
Unit
t
t
ns
ns
ns
ns
ns
ns
cyc
cyc