MC908GZ32VFAER Freescale Semiconductor, MC908GZ32VFAER Datasheet - Page 146
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MC908GZ32VFAER
Manufacturer Part Number
MC908GZ32VFAER
Description
IC MCU 8BIT 32K FLASH 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908GZ60CFJE.pdf
(352 pages)
Specifications of MC908GZ32VFAER
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
37
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 24x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC908GZ32VFAER
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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MSCAN08 Controller (MSCAN08)
During sleep mode, the SLPAK flag is set. The application software should use SLPAK as a handshake
indication for the request (SLPRQ) to go into sleep mode. When in sleep mode, the MSCAN08 stops its
internal clocks. However, clocks to allow register accesses still run. If the MSCAN08 is in bus-off state, it
stops counting the 128*11 consecutive recessive bits due to the stopped clocks. The CAN
recessive state. If RXF = 1, the message can be read and RXF can be cleared. Copying of RxGB into
RxFG doesn’t take place while in sleep mode. It is possible to access the transmit buffers and to clear the
TXE flags. No message abort takes place while in sleep mode.
The MSCAN08 leaves sleep mode (wakes-up) when:
After wakeup, the MSCAN08 waits for 11 consecutive recessive bits to synchronize to the bus. As a
consequence, if the MSCAN08 is woken-up by a CAN frame, this frame is not received. The receive
message buffers (RxFG and RxBG) contain messages if they were received before sleep mode was
entered. All pending actions are executed upon wakeup: copying of RxBG into RxFG, message aborts
and message transmissions. If the MSCAN08 is still in bus-off state after sleep mode was left, it continues
counting the 128*11 consecutive recessive bits.
12.8.2 MSCAN08 Soft Reset Mode
In soft reset mode, the MSCAN08 is stopped. Registers can still be accessed. This mode is used to
initialize the module configuration, bit timing and the CAN message filter. See
Control Register 0
When setting the SFTRES bit, the MSCAN08 immediately stops all ongoing transmissions and
receptions, potentially causing CAN protocol violations.
12.8.3 MSCAN08 Power-Down Mode
The MSCAN08 is in power-down mode when the CPU is in stop mode.
When entering the power-down mode, the MSCAN08 immediately stops all ongoing transmissions and
receptions, potentially causing CAN protocol violations.
To protect the CAN bus system from fatal consequences resulting from violations of the above rule, the
MSCAN08 drives the CAN
In power-down mode, no registers can be accessed.
146
•
•
•
Bus activity occurs, or
The MCU clears the SLPRQ bit, or
The MCU sets the SFTRES bit
The MCU cannot clear the SLPRQ bit before the MSCAN08 is in sleep
mode (SLPAK=1).
The user is responsible to take care that the MSCAN08 is not active when
soft reset mode is entered. The recommended procedure is to bring the
MSCAN08 into sleep mode before the SFTRES bit is set.
The user is responsible to take care that the MSCAN08 is not active when
power-down mode is entered. The recommended procedure is to bring the
MSCAN08 into sleep mode before the STOP instruction is executed.
for a complete description of the soft reset mode.
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
TX
pin into recessive state.
NOTE
NOTE
NOTE
12.13.1 MSCAN08 Module
Freescale Semiconductor
TX
pin stays in
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