AT89LP828-AU Atmel, AT89LP828-AU Datasheet - Page 43

• Manufacturer Part Number: AT89LP828-AU
• Description: 8-bit Microcontrollers - MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V
• Manufacturer: Atmel

Specifications of AT89LP828-AU

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit

11.3
3654A–MICRO–8/09
Mode 2 – 8-bit Auto-Reload Timer/Counter
Figure 11-2. Timer/Counter 1 Mode 1: 16-bit Auto-reload
Mode 2 configures the Timer register as an 8-bit Counter (TL1) with automatic reload, as shown
in
TH1, which is preset by software. The reload leaves TH1 unchanged. Mode 2 operation is the
same for Timer/Counter 0.
Figure 11-3. Timer/Counter 1 Mode 2: 8-bit Auto-reload
Note:
Figure
INT1 Pin
RH1/RL1 are not required by Timer 1 during Mode 2 and may be used as temporary storage
registers.
OSC
INT0 Pin
GATE
T1 Pin
11-3. Overflow from TL1 not only sets TF1, but also reloads TL1 with the contents of
OSC
T1 Pin
GATE
Mode 2:
TR1
÷TPS
÷TPS
TR1
Time-out Period
C/T = 0
C/T =1
C/T = 0
C/T = 1
Control
=
Control
------------------------------------------------------ -
Oscillator Frequency
(8 Bits)
(8 Bits)
(
256 TH0
RL1
TL1
(8 Bits)
(8 Bits)
TH1
TL1
–
(8 Bits)
(8 Bits)
RH1
TH1
)
AT89LP428/828
Reload
×
Reload
(
TPS
TF1
TF1
+
1
)
Interrupt
Interrupt
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