MC9328MX21SCVK Freescale Semiconductor, MC9328MX21SCVK Datasheet - Page 23

• Manufacturer Part Number: MC9328MX21SCVK
• Description: IC MCU I.MX21 266MHZ 289-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX21r

Specifications of MC9328MX21SCVK

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 266MHz
• Connectivity: 1-Wire, EBI/EMI, I²C, IrDA, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 192
• Program Memory Type: ROMless
• Voltage - Supply (vcc/vdd): 1.45 V ~ 3.3 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 289-MAPBGA
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Compliant

Note: All timings assume that the hclk is running at 133 MHz.
Note: At this mode, the maximum frequency of the BMI_CLK/CS can be up to 36 MHz (doubles as maximum data pad speed).
3.8.1.2
In this mode MMD_MODE_SEL and MMD_CLKOUT are both set. The software must know which
mode it is now (READ or WRITE). When the BMI_WRITE is high, BMI drives BMI_CLK/CS out if the
TxFIFO is not emptied. When BMI_WRITE is low, user can write a 1 to READ bit of control register1 to
issue a write cycle (MMD write BMI).
3.8.1.3
Figure 13
is high, the BMI drives BMI_CLK/CS out if data is written to TxFIFO (BMI_READ_REQ become high),
BMI puts data into data bus and enable data out on the rising edge of BMI_CLK/CS. The MMD devices
can latch the data on each falling edge of BMI_CLK/CS.
It is recommended that the MMD do not change the BMI_WRITE signal from high to low when the
BMI_READ_REQ is asserted. If user writes data to the TxFIFO when the BMI_WRITE is low, the BMI
will drive BMI_CLK/CS out once the BMI_WRITE is changed from low to high.
Freescale Semiconductor
BMI_CLK/CS
BMI_READ_REQ
BMI_D[15:0]
BMI_WRITE
shows the MMD read BMI timing when BMI drives the BMI_CLK/CS. When the BMI_WRITE
BMI Drives the BMI_CLK/CS
MMD Read BMI Timing
receive data setup time
write setup time
write
(MMD_MODE_SEL=1, MASTER_MODE_SEL=0, MMD_CLKOUT=0)
Item
old
Figure 7. MMD (ATI) Drives Clock, MMD Write BMI Timing
ime
h
Can be asserted any time
MC9328MX21 Technical Data, Rev. 3.4
t
Ts
Table 15. MMD Write BMI Timing
Symbol
Tds
Th
Ts
RxD1
Tds
Minimum
RxD2
11
0
5
Typical
–
–
–
Can be asserted any time
Maximum
Last RxD
–
–
–
Th
Unit
ns
ns
ns
Specifications
23