參數(shù)資料
型號(hào)： uPSD3251
廠商： 意法半導(dǎo)體
英文描述： Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的Flash可編程系統(tǒng)設(shè)備)
中文描述： 閃存可編程系統(tǒng)設(shè)備與8032微控制器內(nèi)核（帶8032微控制器內(nèi)核的閃存可編程系統(tǒng)設(shè)備）
文件頁數(shù)： 49/128頁
文件大?。?/td> 1566K
代理商： UPSD3251
49/128
μPSD3251F
Mode 0.
Putting either Timer into Mode 0 makes
it look like an 8048 Timer, which is an 8-bit Counter
with a divide-by-32 prescaler. Figure 20 shows the
Mode 0 operation as it applies to Timer 1.
In this mode, the Timer register is configured as a
13-bit register. As the count rolls over from all '1s'
to all '0s,' it sets the Timer Interrupt Flag TF1. The
counted input is enabled to the Timer when TR1 =
1 and either GATE = 0 or /INT1 = 1. (Setting GATE
= 1 allows the Timer to be controlled by external in-
put /INT1, to facilitate pulse width measurements).
TR1 is a control bit in the Special Function Regis-
ter TCON (TCON Control Register). GATE is in
TMOD.
The 13-bit register consists of all 8 bits of TH1 and
the lower 5 bits of TL1. The upper 3 bits of TL1 are
indeterminate and should be ignored. Setting the
run flag does not clear the registers.
Mode 0 operation is the same for the Timer 0 as
for Timer 1. Substitute TR0, TF0, and /INT0 for the
corresponding Timer 1 signals in Figure 20. There
are two different GATE Bits, one for Timer 1 and
one for Timer 0.
Mode 1.
Mode 1 is the same as Mode 0, except
that the Timer register is being run with all 16 bits.
Figure 20. Timer/Counter Mode 0: 13-bit Counter
AI06622
f
OSC
TF1
Interrupt
Gate
TR1
INT1 pin
T1 pin
Control
TL1
(5 bits)
TH1
(8 bits)
C/T = 0
C/T = 1
÷
12
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