User`s manual

41
Timers
. The timer resources are in the 7709A/7729 and the HD64465 companion chip.
Product RS-232 Port
Table 23: Product Serial Port Resource Assignment
Signal Source I/O Port Notes
URDTR HD64465 DTR0
URRXD HD64465 RXD0
URTXD HD64465 TXD0
URDSR HD64465 DSR0
URRTS HD64465 RTS0
URCTS HD64465 CTS0
URDCD HD64465 DCD0
URRI HD64465 RI0
IrDA Serial Interface
Table 24: IrDA Serial Interface Port Assignment
Signal Source I/O Port Notes
IRDAMODSEL HD64465 MODSEL/RX2
IRDATXD HD64465 TXD
IRDARXD HD64465 RX
IRDAID1 HD64465 PD0 R/O
IRDAID2 HD64465 PD1 R/O
IRDAID2 HD64465 PD2 R/O
PS/2 Keyboard
The PS/2 keyboard support is used in the HD64465. Note that this is a PS/2 keyboard, not a
scanned keyboard.
Table 25: PS/2 keyboard Port Assignments
Signal Source I/O Port Notes
Keyboard Data HD64465 KBDAT
Keyboard Clock HD64465 KBCK
Parallel Printer Port
Table 26: Parallel Port Resource Assignment
Signal Source I/O Port Notes
PP_STB# HD64465 STB#
PP_AFD# HD64465 AFD#
PP_ERR# HD64465 ERR#
PP_INIT# HD64465 INIT#
PP_SLIN# HD64465 SLIN#
PP_ACK# HD64465 ACK#