HMS87C1304A Datasheet, PDF (42/70 Pages) Hynix Semiconductor – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

HMS87C1304A/HMS87C1302A
HYUNDAI MicroElectronics
12.5 16-bit Capture Mode
16-bit capture mode is the same as 8-bit capture, except
that the Timer register is being run will 16 bits.
The clock source of the Timer 0 is selected either internal
or external clock by bit T0CK2, T0CK1 and T0CK0.
In 16-bit mode, the bits T1CK1,T1CK0 and 16BIT of TM1
should be set to “1” respectively.
TM0
ADDRESS : D0H
-
-
CAP0 T0CK2 T0CK1 T0CK0 T0CN T0ST
RESET VALUE : --000000
-
-
1
X
X
X
X
X
TM1
POL
16BIT PWME CAP1 T1CK1 T1CK0 T1CN
T1ST
ADDRESS : D2H
RESET VALUE : 00000000
X
1
0
X
1
1
X
X
T0CK[2:0]
Edge Detector
X: The value “0” or “1” corresponding your operation.
T0ST
0 : Stop
1 : Start
EC0
fxin
INT0
÷2
÷4
÷8
÷ 32
÷ 128
÷ 512
÷ 2048
12.6 PWM Mode
y ^MUX
1
T0CN
inar ^CAPTURE
T0 + T1 (16-bit)
CLEAR
COMPARATOR
CDR1 CDR0 TDR1 TDR0
(8-bit) (8-bit) (8-bit) (8-bit)
T0IF
INT0IF
lim ^IEDS[1:0]
Pre^{Figure 12-9 16-bit Capture Mode}
TIMER 0
INTERRUPT
INT 0
INTERRUPT
The HMS87C1304A and HMS87C1302A has a high speed
PWM (Pulse Width Modulation) functions which shared
with Timer1.
In PWM mode, pin RB4/COMP0/PWM0 outputs up to a
10-bit resolution PWM output. This pin should be config-
ure as a PWM output by setting “1” bit PWM0O in RB-
FUNC register.
And writes duty value to the T1PDR and the
PWM0HR[1:0] same way.
The T1PDR is configure as a double buffering for glitch-
less PWM output. In Figure 12-10 , the duty data is trans-
ferred from the master to the slave when the period data
matched to the counted value. (i.e. at the beginning of next
duty cycle)
The period of the PWM output is determined by the
T1PPR (PWM0 Period Register) and PWM0HR[3:2]
(bit3,2 of PWM0 High Register) and the duty of the PWM
output is determined by the T1PDR (PWM0 Duty Regis-
ter) and PWM0HR[1:0] (bit1,0 of PWM0 High Register).
The user writes the lower 8-bit period value to the T1PPR
and the higher 2-bit period value to the PWM0HR[3:2].
PWM Period = [PWM0HR[3:2]T1PPR] X Source Clock
PWM Duty = [PWM0HR[1:0]T1PDR] X Source Clock
The relation of frequency and resolution is in inverse pro-
portion. Table 12-2 shows the relation of PWM frequency
vs. resolution.
42
Preliminary
Jan. 2001