Figure 86. 10-Bit Addressing Write Transmit Mode; Figure 87. 10-Bits Addressing Read Receive Mode - Holtek HT32F52220 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52220/HT32F52230
10-bits Address Format
In order to prevent address clashes, due to the limited range of the 7-bit addresses, a new 10-bit
address scheme has been introduced. This enhancement can be mixed with the 7-bit addressing
mode which increases the available address range about ten times. For the 10-bit addressing mode,
the first two bytes after a START signal include a header byte and an address byte that usually
determines which slave will be selected by the master. The header byte is composed of a leading
"11110", 10 th and 9
slave device.
S 1

Figure 86. 10-bit Addressing Write Transmit Mode

MSB
S 1 1 1 1 0 A9 A8
S = START condition
Sr = Repeated-START condition
W = Write command
R = Read command
Ack = Acknowledge
A9 ~ A0 = 10-bits Address

Figure 87. 10-bits Addressing Read Receive Mode

Rev. 1.10
th bits of the slave address. The second byte is the remaining 8 bit address of the
MSB
1 1 1 0 A9 A8 W
S = START condition
W = Write command
Ack = Acknowledge
A9 ~ A0 = 10-bits Address
W Ack A7 A6 A5 A4 A3 A2
282 of 366
Ack A7 A6 A5 A4 A3 A2
LSB
A1 A0 Ack Sr 1 1 1
LSB
A1 A0 Ack Data
1 0 A9 A8 R Ack Data
November 09, 2018