MC68HC908GT16CFB Freescale Semiconductor, MC68HC908GT16CFB Datasheet - Page 247
MC68HC908GT16CFB
Manufacturer Part Number
MC68HC908GT16CFB
Description
IC MCU 16K FLASH 8MHZ SPI 44PQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908GT8CFBE.pdf
(292 pages)
Specifications of MC68HC908GT16CFB
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
36
Program Memory Size
16KB (16K 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
-
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19.3.1.1 Normal Monitor Mode
When V
divide-by-two of the input clock. If PTC3 is high with V
bus frequency will be a divide-by-four of the input clock. Holding the PTC3 pin low when entering monitor
mode causes a bypass of a divide-by-two stage at the oscillator only if V
event, the CGMOUT frequency is equal to the CGMXCLK frequency, and the OSC1 input directly
generates internal bus clocks. In this case, the OSC1 signal must have a 50% duty cycle at maximum bus
frequency.
Freescale Semiconductor
Normal
Monitor
Forced
Monitor
User
MON08
Function
[Pin No.]
1. PTA0 must have a pullup resistor to VDD in monitor mode.
2. Communication speed in the table is an example to obtain a baud rate of 9600.
3. External clock is a 4.1952 MHz or 9.8304 MHz canned oscillator on OSC1.
4. X = don’t care.
5. MON08 pin refers to P&E Microcomputer Systems’ MONOUT-Cyclone 2 by 8-pin connector.
Mode
Baud rate using external oscillator is bus frequency / 256.
TST
or V
V
V
V
IRQ
V
V
V
[6]
TST
TST
TST
DD
SS
DD
is applied to IRQ and PTC3 is low upon monitor mode entry, the bus frequency is a
SS
V
V
DD
DD
or V
RST
RST
V
V
V
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
[4]
or V
or V
Table 19-1. Monitor Mode Signal Requirements and Options
DD
DD
DD
SS
SS
SS
Vector
(blank)
(blank)
$FFFF
$FFFF
$FFFF
Reset
Not
—
X
X
Comm.
Serial
PTA0
COM
OSC1
[8]
X
1
1
1
1
V
NC
NC
NC
NC
NC
NC
DD
Mode Selection Divider
MOD0
PTC0
[12]
11
13
15
X
X
X
1
1
1
3
5
7
9
MOD1
PTC1
[14]
10
12
14
16
X
X
X
0
0
2
4
6
8
TST
GND
RST
IRQ
NC
PTC1
PTC3
PTA0
PTC0
PTC3
DIV4
[16]
applied to IRQ upon monitor mode entry, the
X
X
X
0
1
OFF Disabled
OFF Disabled
OFF Disabled
ICG
ON Disabled
—
X
Enabled
COP
—
TST
is applied to IRQ. In this
External
4.9152
9.8304
9.8304
Clock
OSC1
MHz
MHz
MHz
[13]
Communication Speed
X
X
Monitor Module (MON)
Frequency
Nominal
2.4576
2.4576
2.4576
2.4576
MHz
MHz
MHz
MHz
Bus
—
X
Nominal
Range
Baud
9600
9600
9600
9600
—
X
247
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