Rev. 1.10
72
November 04, 2019
Rev. 1.10
73
November 04, 2019
HT45F5Q-3
Battery Charger Flash MCU
HT45F5Q-3
Battery Charger Flash MCU
Standard Type TM – STM
The Standard Type TM contains five operating modes, which are Compare Match Output, Timer/Event
Counter, Capture Input, Single Pulse Output and PWM Output modes. The Standard TM can be
controlled with two external input pins and can drive two external output pins.
f
SYS
f
SYS
/4
f
H
/64
f
H
/16
f
SUB
000
001
010
011
100
101
110
111
STCK2~STCK0
10-bit Count-up Counter
3-bit Comparator P
CCRP
b7~b9
b0~b9
10-bit Comparator A
STON
STPAU
Comparator A Match
Comparator P Match
Counter Clear
0
1
Output
Control
Polarity
Control
STOC
STM1~STM0
STIO1~STIO0
STMAF Interrupt
STMPF Interrupt
STPOL
CCRA
STCCLR
Edge Detector
STIO1~STIO0
f
SUB
STPI
STCK
STPB
STP
Note:
The
S
TM external pins are pin-shared with other functions, so before using the
S
TM function the pin-shared
function registers must be set properly to enable the STM pin function
.
Standard Type TM Block Diagram
Standard TM Operation
The size of Standard TM is 10-bit wide and its core is a 10-bit count-up counter which is driven by
a user selectable internal or external clock source. There are also two internal comparators with the
names, Comparator A and Comparator P. These comparators will compare the value in the counter
with CCRP and CCRA registers. The CCRP comparator is 3-bit wide whose value is compared with
the highest 3 bits in the counter while the CCRA is the 10 bits and therefore compares all counter bits.
The only way of changing the value of the 10-bit counter using the application program, is to
clear the counter by changing the STON bit from low to high. The counter will also be cleared
automatically by a counter overflow or a compare match with one of its associated comparators.
When these conditions occur, a STM interrupt signal will also usually be generated. The Standard
Type TM can operate in a number of different operational modes, can be driven by different clock
sources including an input pin and can also control two output pins. All operating setup conditions
are selected using relevant internal registers.
Standard Type TM Register Description
Overall operation of the Standard TM is controlled using a series of registers. A read only register
pair exists to store the internal counter 10-bit value, while a read/write register pair exists to store
the internal 10-bit CCRA value. The remaining two registers are control registers which setup the
different operating and control modes as well as three CCRP bits.
