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參數(shù)資料
| 型號(hào)： | XA-C3 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | XA 16-bit microcontroller family 32K/1024 OTP CAN transport layer controller 1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID Filters, transport layer co-proce |
| 中文描述： | 的XA 16位微控制器系列32K/1024檢察官可以傳輸層控制器1的UART，1個(gè)SPI端口，CAN 2.0B總線，32可以讀取器，傳輸層合作proce |
| 文件頁數(shù)： | 20/68頁 |
| 文件大小： | 368K |
| 代理商： | XA-C3 |
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Philips Semiconductors
Preliminary specification
XA-C3
XA 16-bit microcontroller family
32K/1024 OTP CAN transport layer controller
1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID filters, transport layer co-processor
2000 Jan 25
13
New Enhanced Mode 0
For timers T0 or T1 the 13–bit count mode on the 80C51 (current
Mode 0) has been replaced in the XA with a 16–bit auto–reload
mode. Four additional 8–bit data registers (two per timer: RTHn and
RTLn) are created to hold the auto–reload values. In this mode, the
TH overflow will set the TF flag in the TCON register (see Figure 7)
and cause both the TL and TH counters to be loaded from the RTL
and RTH registers respectively.
These new SFRs will also be used to hold the TL reload data in the
8–bit auto–reload mode (Mode 2) instead of TH.
The overflow rate for Timer 0 or Timer 1 in Mode 0 may be
calculated as follows:
Timer_Rate =
f
osc / (N * (65536 – Timer_Reload_Value))
where N = the TCLK prescaler value: 4 (default), 16, or 64.
Mode 1
Mode 1 is the 16–bit non–auto reload mode.
Mode 2
Mode 2 configures the Timer register as an 8–bit Counter (TLn) with
automatic reload. Overflow from TLn not only sets TFn, but also
reloads TLn with the contents of RTLn, which is preset by software.
The reload leaves THn unchanged.
Mode 2 operation is the same for Timer/Counter 0.
The overflow rate for Timer 0 or Timer 1 in Mode 2 may be
calculated as follows:
Timer_Rate =
f
osc / (N * (256 – Timer_Reload_Value))
where N = the TCLK prescaler value: 4, 16, or 64.
Mode 3
Timer 1 in Mode 3 simply holds its count. The effect is the same as
setting TR1 = 0.
Timer 0 in Mode 3 establishes TL0 and TH0 as two separate
counters. TL0 uses the Timer 0 control bits: C0 ; T0
/
, GATE0, TR0,
INT0
/
and TF0. TH0 is locked into a timer function and takes over
the use of TR1 and TF1 from Timer 1. Thus, TH0 now controls the
“Timer 1” interrupt.
Mode 3 is provided for applications requiring an extra 8–bit timer.
When Timer 0 is in Mode 3, Timer 1 can be turned on and off by
switching it out of and into its own Mode 3, or can still be used by
the serial port as a baud rate generator, or in fact, in any application
not requiring an interrupt.
IT0
LSB
MSB
BIT
TCON.7
SYMBOL
TF1
FUNCTION
Timer 1 overflow flag. Set by hardware on Timer/Counter overflow.
This flag will not be set if T1OE (TSTAT.2) is set.
Cleared by hardware when processor vectors to interrupt routine, or by clearing the bit in software.
Timer 1 Run control bit. Set/cleared by software to turn Timer/Counter 1 on/off.
Timer 0 overflow flag. Set by hardware on Timer/Counter overflow.
This flag will not be set if T0OE (TSTAT.0) is set.
Cleared by hardware when processor vectors to interrupt routine, or by clearing the bit in software.
Timer 0 Run control bit. Set/cleared by software to turn Timer/Counter 0 on/off.
Interrupt 1 Edge flag. Set by hardware when external interrupt edge detected.
Cleared when interrupt processed.
Interrupt 1 type control bit. Set/cleared by software to specify falling edge/low level triggered
external interrupts.
Interrupt 0 Edge flag. Set by hardware when external interrupt edge detected.
Cleared when interrupt processed.
Interrupt 0 Type control bit. Set/cleared by software to specify falling edge/low level
triggered external interrupts.
TCON.6
TCON.5
TR1
TF0
TCON.4
TCON.3
TR0
IE1
TCON.2
IT1
TCON.1
IE0
TCON.0
IT0
SU00604C
IE0
IT1
IE1
TR0
TF0
TR1
TF1
TCON Address:410
Bit Addressable
Reset Value: 00H
Figure 7. Timer/Counter Control (TCON) Register
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