MC9S08JM16CGT Freescale Semiconductor, MC9S08JM16CGT Datasheet - Page 124
![MCU 8BIT 16K FLASH 48-QFN](/photos/37/62/376240/qfn-48_sml.jpg)
MC9S08JM16CGT
Manufacturer Part Number
MC9S08JM16CGT
Description
MCU 8BIT 16K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.DEMO9S08JM16.pdf
(386 pages)
Specifications of MC9S08JM16CGT
Core Processor
HCS08
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, LIN, SCI, SPI, USB
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
37
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN Exposed Pad
Processor Series
S08JM
Core
HCS08
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
I2C, SPI
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
37
Number Of Timers
2
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMOJM, DEMOJMSKT, DEMOFLEXISJMSD, DEMO9S08JM16
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 8 Channel
Controller Family/series
HCS08
No. Of I/o's
37
Ram Memory Size
1KB
Cpu Speed
48MHz
No. Of Timers
2
Digital Ic Case Style
QFN
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
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Manufacturer:
PIXART
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Part Number:
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FREESCALE
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Keyboard Interrupts (S08KBIV2)
8.4
This on-chip peripheral module is called a keyboard interrupt (KBI) module because originally it was
designed to simplify the connection and use of row-column matrices of keyboard switches. However, these
inputs are also useful as extra external interrupt inputs and as an external means of waking the MCU from
stop or wait low-power modes.
The KBI module allows up to eight pins to act as additional interrupt sources. Writing to the KBIPEn bits
in the keyboard interrupt pin enable register (KBIPE) independently enables or disables each KBI pin.
Each KBI pin can be configured as edge sensitive or edge and level sensitive based on the KBMOD bit in
the keyboard interrupt status and control register (KBISC). Edge sensitive can be software programmed to
be either falling or rising; the level can be either low or high. The polarity of the edge or edge and level
sensitivity is selected using the KBEDGn bits in the keyboard interrupt edge select register (KBIES).
8.4.1
Synchronous logic is used to detect edges. A falling edge is detected when an enabled keyboard interrupt
(KBIPEn=1) input signal is seen as a logic 1 (the deasserted level) during one bus cycle and then a logic 0
(the asserted level) during the next cycle. A rising edge is detected when the input signal is seen as a logic
0 (the deasserted level) during one bus cycle and then a logic 1 (the asserted level) during the next
cycle.Before the first edge is detected, all enabled keyboard interrupt input signals must be at the
deasserted logic levels. After any edge is detected, all enabled keyboard interrupt input signals must return
to the deasserted level before any new edge can be detected.
A valid edge on an enabled KBI pin will set KBF in KBISC. If KBIE in KBISC is set, an interrupt request
will be presented to the CPU. Clearing of KBF is accomplished by writing a 1 to KBACK in KBISC.
8.4.2
A valid edge or level on an enabled KBI pin will set KBF in KBISC. If KBIE in KBISC is set, an interrupt
request will be presented to the CPU. Clearing of KBF is accomplished by writing a 1 to KBACK in
124
KBEDGn
Field
7:0
Reset:
Functional Description
Keyboard Edge Selects — Each of the KBEDGn bits selects the falling edge/low level or rising edge/high level
function of the corresponding pin).
0 Falling edge/low level.
1 Rising edge/high level.
W
Edge Only Sensitivity
Edge and Level Sensitivity
R
KBEDG7
0
7
KBEDG6
0
6
Table 8-4. KBIES Register Field Descriptions
Figure 8-5. KBI Edge Select Register
MC9S08JM16 Series Data Sheet, Rev. 2
KBEDG5
5
0
KBEDG4
0
4
Description
KBEDG3
0
3
KBEDG2
0
2
KBEDG1
0
1
Freescale Semiconductor
KBEDG0
0
0
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