HT82K629A Windows 2000 USB+PS/2 Keyboard Encoder Features Operating voltage: 4.4V~5.5V Supports PS2 code set 1 and code set 2 Operating frequency: f =6M Supports multimedia key SYS Design for Windows 95/98/NT/2000/XP Supports ACPI key Phantom key detection Supports mini-keyboard with Fn key Low voltage reset function Built-in Watchdog Timer USB and PS2 modes supported HALT function and wake-up feature for USB mode to reduce power consumption Auto detect USB or PS2 interface 40-pin DIP package USB 1.1 low speed function General Description The HT82K629A can function both in USB and PS2 in- is stored. For USB interface, it can support the USB terface environment. For PS2 interface, it supports IBM standard request as well as HID class request version PC/AT, IBM PS/2 and all compatible machines and pro- 1.1. vides a 16-character first-in-first-out buffer in which data Block Diagram * + , - . / * & , - . * 0 0 % & 1 1 ) ) 2 ( ( ) ) . * * Rev. 1.40 1 September 15, 2004HT82K629A Pin Assignment 2 6 2 3 4 2 % 2 7 2 5 . 1 5 1 3 1 1 % . 8 3 1 6 2 7 8 1 7 4 6 7 1 8 ( 9 2 2 6 1 3 : 1 1 2 4 % 0 - 5 1 . 5 ) % 2 4 1 2 2 . ) 2 2 1 4 2 1 ) ) 2 5 2 3 2 1 . % 2 8 2 3 . 6 * * 6 2 8 . 7 1 1 ) 2 7 . 8 7 * + , / 2 6 . 3 8 * & , * 0 0 3 2 % . 1 4 1 2 5 2 4 . 2 Pin Description Pin No. Pin Name I/O Description 1, 2, 11~14 19~26, 31~34 C0~C19 O Keyboard matrix scanning output pins 39, 40 3~6, 35~38 R0~R7 I Keyboard matrix scanning input pins 7 Fn Sel I Mini-keyboard select, the function is enabled if connected to VSS. 8 NUM O Num lock indicator 9 CAPS O Caps lock indicator 10 SCROLL O Scroll lock indicator 15 VDD Positive power supply 16 V33O 3.3V regulator output USBD- or PS2 CLK I/O line 17 USBD+/CLK I/O USB or PS2 function is controlled by software control register. USBD- or PS2 DATA I/O line 18 USBD-/DATA I/O USB or PS2 function is controlled by software control register. 27 VSS Negative power supply, ground 28 RESET I Schmitt trigger input. Active low. 29 OSCO O OSCO, OSCI are connected to a 6MHz or 12MHz crystal/resonator for 30 OSCI I the internal system clock. Absolute Maximum Ratings Supply Voltage ..........................V 0.3V to V +6.0V Storage Temperature ........................... 50 Cto125 C SS SS Input Voltage .............................V 0 3V to V +0.3V Operating Temperature ..............................0 Cto70 C SS . DD Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil- ity. Rev. 1.40 2 September 15, 2004