ST92F124R9TB STMicroelectronics, ST92F124R9TB Datasheet - Page 200
![IC MCU 8BIT 64K MEMORY 64-LQFP](/photos/12/15/121504/stmicroelectronics-64-lqfp_sml.jpg)
ST92F124R9TB
Manufacturer Part Number
ST92F124R9TB
Description
IC MCU 8BIT 64K MEMORY 64-LQFP
Manufacturer
STMicroelectronics
Series
ST9r
Datasheet
1.ST92F150CV1TB.pdf
(429 pages)
Specifications of ST92F124R9TB
Core Processor
ST9
Core Size
8/16-Bit
Speed
24MHz
Connectivity
I²C, SCI, SPI
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
48
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
64-LQFP
Processor Series
ST92F12x
Core
ST9
Data Bus Width
8 bit, 16 bit
Data Ram Size
6 KB
Interface Type
CAN, I2C, SCI, SPI
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
80
Number Of Timers
16 bit
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Development Tools By Supplier
ST92F150-EPB
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ST92F124R9TB
Manufacturer:
STMicroelectronics
Quantity:
10 000
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MULTIFUNCTION TIMER (MFT)
MULTIFUNCTION TIMER (Cont’d)
Figure 105. Pointer Mapping for Register to
Register Transfers
10.4.5.4 DMA Transaction Priorities
Each Timer DMA transaction is a 16-bit operation,
therefore two bytes must be transferred sequen-
tially, by means of two DMA transfers. In order to
speed up each word transfer, the second byte
transfer is executed by automatically forcing the
peripheral priority to the highest level (000), re-
gardless of the previously set level. It is then re-
stored to its original value after executing the
transfer. Thus, once a request is being serviced,
its hardware priority is kept at the highest level re-
gardless of the other Timer internal sources, i.e.
once a Comp0 request is being serviced, it main-
tains a higher priority, even if a Capt0 request oc-
curs between the two byte transfers.
200/429
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Register File
8 bit Counter
8 bit Addr Pointer
8 bit Counter
8 bit Addr Pointer
XXXXXX11
XXXXXX10
XXXXXX01
XXXXXX00
Compare 0
Capture 0
10.4.5.5 DMA Swap Mode
After a complete data table transfer, the transac-
tion counter is reset and an End Of Block (EOB)
condition occurs, the block transfer is completed.
The End Of Block Interrupt routine must at this
point reload both address and counter pointers of
the channel referred to by the End Of Block inter-
rupt source, if the application requires a continu-
ous high speed data flow. This procedure causes
speed limitations because of the time required for
the reload routine.
The SWAP feature overcomes this drawback, al-
lowing high speed continuous transfers. Bit 2 of
the DMA Counter Pointer Register (DCPR) and of
the DMA Address Pointer Register (DAPR), tog-
gles after every End Of Block condition, alternately
providing odd and even address (D2-D7) for the
pair of pointers, thus pointing to an updated pair,
after a block has been completely transferred. This
allows the User to update or read the first block
and to update the pointer values while the second
is being transferred. These two toggle bits are soft-
ware writable and readable, mapped in DCPR bit 2
for the CM0 channel, and in DAPR bit 2 for the
CP0 channel (though a DMA event on a channel,
in Swap mode, modifies a field in DAPR and
DCPR common to both channels, the DAPR/
DCPR content used in the transfer is always the bit
related to the correct channel).
SWAP mode can be enabled by the SWEN bit in
the IDCR Register.
WARNING: Enabling SWAP mode affects both
channels (CM0 and CP0).
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