參數(shù)資料
型號: ISP1130N
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: Universal Serial Bus compound hub with integrated keyboard controller
中文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PDIP56
封裝: PLASTIC, SDIP-56
文件頁數(shù): 39/68頁
文件大?。?/td> 1786K
代理商: ISP1130N
Philips Semiconductors
ISP1130
USB compound hub with keyboard controller
Objective specification
Rev. 01 — 23 March 2000
39 of 68
9397 750 06895
Philips Electronics N.V. 2000. All rights reserved.
10.4 Hub control registers
The hub control registers (Command and Data) are mapped to the external data
memory space of the 80C51 as shown in
Table 57
. To access these registers use a
MOVX instruction.
10.5 Interrupt structure
The ISP1130 implements a 6-source interrupt structure with 2 priority levels. The
interrupt vector addresses and polling sequence is given in
Table 58
. The interrupt
priority levels are set via the Interrupt Polarity (IP) register (see
Table 61
) and the
interrupts can be enabled or disabled via the Interrupt Enable (IE) register (see
Table 59
).
External interrupt 0 (EX0) is generated by the USB core when an activity occurs for
any of the three embedded functions. Interrupt EX0 is level-triggered and sets bit IE0
in the TCON register. IE0 is cleared by hardware when the service routine is entered.
External interrupt 1 (EX1) is generated by a key press in the matrix. Interrupt EX1 is
level-triggered and sets bit IE1 in the TCON register. IE1 is cleared by hardware
when the service routine is entered. When the device is in ‘suspend’ state (the
microcontroller clock is disabled), interrupt EX1 is registered and an internal Remote
Wakeup is generated to restart the PLL and the clocks. When the device resumes its
function and the clock to microcontroller core has been restored, the firmware
branches to the interrupt service routine for EX1.
External interrupt 2 (IN2) is generated by input pin INT, which is edge-triggered
(HIGH-to-LOW transition).
Timer 0 and Timer 1 interrupts are generated by a timer register overflow (except for
Timer 0 in Mode 3), signalled by bits TF0 and TF1 in the TCON register. The bit that
generated the interrupt is cleared by hardware, when the service routine is entered.
Table 57: Hub control registers: address mapping
Register
Command
Data
Access
write
read/write
Address (Hex)
FFFE
FFFF
Table 58: Interrupt vectors and polling sequence
Source
Description
EX0
external 0 interrupt (USB)
ET0
timer 0 interrupt
EX1
external 1 interrupt (keyboard)
ET1
timer 1 interrupt
I2C
I
2
C-bus interrupt
IN2
external 2 interrupt (input INT)
Vector address
0003H
000BH
0013H
001BH
0023H
002BH
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