HT67F60 datasheet(164/242 Pages) HOLTEK

164 / 242 page

Rev. 1.50

164

March 06 , 2012

Rev. 1.50

165

March 06 , 2012

HT67F30/HT67F40/HT67F50/HT67F60

TinyPowerTM A/D Flash Type 8-Bit MCU with LCD & EEPRO

SPI Registers

There are three internal registers which control the overall operation of the SPI interface. These are

the SIMD data register and two registers SIMC0 and SIMC2. Note that the SIMC1 register is only

used by the I2C interface.

Name

Bit

SIMC0

SIM2

SIM1

SIM0

PCKEN

PCKP1

PCKP0

SIMEN

—

SIMD

SIMC2

CKPOLB

CKEG

MLS

CSEN

WCOL

TRF

SIM Registers List

The SIMD register is used to store the data being transmitted and received. The same register is used

by both the SPI and I2C functions. Before the device writes data to the SPI bus, the actual data to be

transmitted must be placed in the SIMD register. After the data is received from the SPI bus, the

device can read it from the SIMD register. Any transmission or reception of data from the SPI bus

must be made via the SIMD register.

●

SIMD Register

Bit

Name

R/W

POR

"x" unknow

There are also two control registers for the SPI interface, SIMC0 and SIMC2. Note that the SIMC2

by the SPI function, only by the I2C function. Register SIMC0 is used to control the enable/disable

function and to set the data transmission clock frequency. Although not connected with the SPI

function, the SIMC0 register is also used to control the Peripheral Clock Prescaler. Register SIMC2

is used for other control functions such as LSB/MSB selection, write collision flag etc.

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