HT56RB27 Datasheet, PDF (128/153 Pages) Holtek Semiconductor Inc – TinyPowerTM A/D Type Smart Card OTP MCU with DAC, ISO 7816 and USB Interfaces

HT56RB27
TinyPower^TM A/D Type Smart Card OTP MCU
with DAC, ISO 7816 and USB Interfaces
CETU Registers
The CETU registers, CETU1 and CETU0, contain the specific values determined by the formula
described in the ETU section. It also includes a control bit of the Compensation function for the ETU
time granularity. Note that the value of the ETU must be in the range of 001H to 7FFH. To obtain the
maximum ETU decimal value of 2048, a 000H value should be written into the ETU10~ETU0 bits.
Further explanation on each bit is given below:
Bit
7
6
5
4
3
2
1
0
Name
COMP
¾
¾
¾
¾
ETU10
ETU9
ETU8
R/W
R/W
¾
¾
¾
¾
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
1
Bit 7
Bit 6~3
Bit 2~0
COMP: Compensation function enable control
0: Compensation function is disabled.
1: Compensation function is enabled.
This bit is set and cleared by application program used to control the Compensation function.
The Compensation function has been described and more details can be obtained in the ETU
section.
Unimplemented, read as ²0².
ETU10~ETU8: bit 10~8 of the ETU value
The bits are set and cleared by application program to modify the ETU values. Writing to the
CETU1 register will reload the updated value into the ETU counter.
CETU0 Register
Bit
Name
R/W
POR
7
ETU7
R/W
0
6
ETU6
R/W
1
5
ETU5
R/W
1
4
ETU4
R/W
1
3
ETU3
R/W
0
2
ETU2
R/W
1
1
ETU1
R/W
0
Bit 7~0
ETU7~ETU0: bit 7~0 of the ETU value
The bits are set and cleared by application program to modify the ETU values.
0
ETU0
R/W
0
Rev. 1.20
128
April 26, 2013