MC68HC908JB16JDW Freescale Semiconductor, MC68HC908JB16JDW Datasheet - Page 175
![IC MCU 16K FLASH 6MHZ USB 20SOIC](/photos/6/50/65027/375-20-soic_sml.jpg)
MC68HC908JB16JDW
Manufacturer Part Number
MC68HC908JB16JDW
Description
IC MCU 16K FLASH 6MHZ USB 20SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908JB16DWE.pdf
(332 pages)
Specifications of MC68HC908JB16JDW
Core Processor
HC08
Core Size
8-Bit
Speed
6MHz
Connectivity
SCI, USB
Peripherals
LED, LVD, POR, PWM
Number Of I /o
13
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
384 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
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Part Number:
MC68HC908JB16JDWE
Manufacturer:
FREESCALE
Quantity:
20 000
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11.5.4 Resume After Suspend
11.5.4.1 Host Initiated Resume
11.5.4.2 USB Reset Signalling
11.5.4.3 Remote Wakeup
MC68HC908JB16
Freescale Semiconductor
—
Rev. 1.1
The MCU can be activated from the suspend state by normal bus
activity, a USB reset signal, or by a forced resume driven from the MCU.
The host signals resume by initiating resume signalling (K state) for at
least 20ms followed by a standard low-speed EOP signal. This 20ms
ensures that all devices in the USB network are awakened.
After resuming the bus, the host must begin sending bus traffic within
3ms to prevent the device from re-entering suspend mode.
Reset can wake a device from the suspended mode.
The MCU also supports the remote wakeup feature. The firmware has
the ability to exit suspend mode by signaling a resume state to the
upstream host or hub. A non-idle state (K state) on the USB data lines is
accomplished by asserting the FRESUM bit in the UCR1 register.
When using the remote wakeup capability, the firmware must wait for at
least 5ms after the bus is in the idle state before sending the remote
wakeup resume signaling. This allows the upstream devices to get into
their suspend state and prepare for propagating resume signaling. The
FRESUM bit should be asserted to cause the resume state on the USB
data lines for at least 10ms, but not more than 15ms. Note that the
resume signalling is controlled by the FRESUM bit and meeting the
timing specifications is dependent on the firmware. When FRESUM is
cleared by firmware, the data lines will return to their high-impedance
state.
Refer to register definitions (see
more information about how the force resume (FRESUM) bit can be
used to initiate the remote wakeup feature.
Universal Serial Bus Module (USB)
11.8.6 USB Control Register
Universal Serial Bus Module (USB)
Technical Data
1) for
175
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