STR912FW44X6 STMicroelectronics, STR912FW44X6 Datasheet - Page 31

• Manufacturer Part Number: STR912FW44X6
• Description: MCU 512K FLASH 96K SRAM USB CAN
• Manufacturer: STMicroelectronics
• Series: STR9r

Specifications of STR912FW44X6

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 96MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, IrDA, Microwire, SPI, SSI, SSP, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 80
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 96K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 2 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-LQFP
• For Use With: 497-8267 - BOARD EVAL BASED ON STR9MCBSTR9UME - BOARD EVAL MCBSTR9 + ULINK-MEMCBSTR9U - BOARD EVAL MCBSTR9 + ULINK2497-5859 - EVAL BRD FULL USB DONGLE STR912MCBSTR9 - BOARD EVAL STM STR9 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-5063-2; 497-5063-2; 497-5063-2ND; STR912FW44X6T

STR91xF
●
●
Figure 4.
To use all 24 address bits, the following applies: 8 bits of lowest-order data and 8 bits of
lowest-order address are multiplexed on port 8. On port 9, 8-bits of mid-order address are
multiplexed with 8 bits of data, but these 8 data values are always at logic zero on this port
during a write operation, and these 8 data bits are ignored during a read operation. An
external latch device (such as a ‘373 latch) is needed to de-multiplex the mid-order 8
address bits that are generated on port 8. Port 7 outputs the 8 highest-order address
signals directly (not multiplexed). The output signal on pin EMI_ALE is used to demultiplex
the signals on ports 8 and 9, and the polarity of EMI_ALE is programmable. The output
signal on pin EMI_BWR_WRLn is the data write strobe, and the output on pin EMI_RDn is
the data read strobe.
respectively. The output signal EMI_RDn is the read strobe for both the low and high data
bytes.
8-bit multiplexed data mode: This is a variant of the 16-bit multiplexed mode. Although
this mode can provide 24 bits of address and 8 bits of data, it does require an external
latch device on Port 8. However, this mode is most efficient when connecting devices that
only require 8 bits of address on an 8-bit multiplexed address/data bus, and have simple
read, write, and latch inputs as shown in
8-bit non-multiplexed data mode
of address are output on ports 7 and 9. The output signal on pin EMI_BWR_BWLn is the
data write strobe and the output on pin EMI_RDn is the data read strobe.
EMI 16-bit multiplexed connection example
STR91xx
EMI_BWR_WRLn
EMI_WRHn
EMI_AD15
EMI_AD14
EMI_AD13
EMI_AD12
EMI_AD11
EMI_AD10
EMI_CS3n
EMI_CS2n
EMI_CS1n
EMI_CS0n
EMI_AD9
EMI_AD8
EMI_AD7
EMI_AD6
EMI_AD5
EMI_AD4
EMI_AD3
EMI_AD2
EMI_AD1
EMI_AD0
EMI_RDn
EMI_ALE
EMI_A22
EMI_A21
EMI_A20
EMI_A19
EMI_A18
EMI_A17
EMI_A16
EMI_A23
P7.7
P7.6
P7.5
P7.4
P7.3
P7.2
P7.1
P7.0
P9.7
P9.6
P9.5
P9.4
P9.3
P9.2
P9.1
P9.0
P8.7
P8.6
P8.5
P8.4
P8.3
P8.2
P8.1
P8.0
(Figure
Figure 5
6): Eight bits of data are on port 8, while 16 bits
CHIP_SELECT
WRITE_HIGH_BYTE
WRITE_LOW_BYTE
READ
ADDR_LATCH
A23
A22
A21
A20
A19
A18
A17
A16
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
DEVICE
16-BIT
Functional overview
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