S912XEP100J5MAG Freescale Semiconductor, S912XEP100J5MAG Datasheet - Page 222
S912XEP100J5MAG
Manufacturer Part Number
S912XEP100J5MAG
Description
MCU 64K FLASH 144-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.S912XEP100J5MAG.pdf
(1328 pages)
Specifications of S912XEP100J5MAG
Core Processor
HCS12X
Core Size
16-Bit
Speed
50MHz
Connectivity
CAN, EBI/EMI, I²C, IrDA, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
119
Program Memory Size
1MB (1M x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
1.72 V ~ 5.5 V
Data Converters
A/D 24x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Chapter 3 Memory Mapping Control (S12XMMCV4)
3.4.4.1
The arbitration scheme allows only one master to be connected to a target at any given time. The following
rules apply when prioritizing accesses from different masters to the same target bus:
3.5
3.5.1
CALL and RTC instructions are uninterruptable CPU instructions that automate page switching in the
program page window. The CALL instruction is similar to the JSR instruction, but the subroutine that is
222
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
•
•
•
•
•
CPU always has priority over BDM and XGATE.
XGATE access to PRU registers constitutes a special case. It is always granted and stalls the CPU
for its duration.
XGATE has priority over BDM.
BDM has priority over CPU and XGATE when its access is stalled for more than 128 cycles. In the
later case the suspect master will be stalled after finishing the current operation and the BDM will
gain access to the bus.
In emulation modes all internal accesses are visible on the external bus as well and the external bus
is used during access to the PRU registers.
Initialization/Application Information
EBI
XGATE
CALL and RTC Instructions
XBUS3
Master Bus Prioritization regarding access conflicts on Target Buses
XGATE
XBUS1
FLASH
DBG
FTM
MC9S12XE-Family Reference Manual , Rev. 1.23
Figure 3-23. MMC Block Diagram
MMC “Crossbar Switch”
EEE
XBUS0
CPU
S12X0
resources
BDM
BDM
S12X1
XSRAM
XRAM
Freescale Semiconductor
FLEXRAY
IPBI
S12X2
XBUS2
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