Usb Boot Mode (Hd64F2215U); Table 19.6 Enumeration Information - Hitachi H8S/2215 Series Hardware Manual

19.6.2

USB Boot Mode (HD64F2215U)

•
Features
- Selection of bus power mode or self power mode
- Supports only 16 MHz system clock, with USB operating clock generation by means of
PLL3 multiplication
- D+ pull-up control connection supported for P36 pin only
- See table 19.6 for enumeration information

Table 19.6 Enumeration Information

USB standard
Transfer modes
Maximum power
Endpoint configuration
•
Notes on USB Boot Mode Execution
- Use a 16 MHz system clock and an external circuit configuration that allows the use of a
PLL. USB boot mode execution is not possible with other combinations.
- Use the P36 pin for D+ pull-up control connection.
- To ensure stable power supply during flash memory programming/erasing, do not use cable
connection via a bus powered HUB.
- Note in particular that, in the worst case, the LSI may be permanently damaged if the USB
cable is detached during flash memory programming/erasing.
- A transition is not made to software standby mode (a power-down mode) even if the USB
bus enters suspend mode when in bus power mode.
•
Overview
When a reset start is performed after the pins of this LSI have been set to boot mode, a boot
program incorporated in the microcomputer beforehand is activated, and the prepared
programming control program is transmitted sequentially to the host using the USB. With this
LSI, the programming control program received by the USB is written to a programming
control program area in on-chip RAM. After transfer is completed, control branches to the
start address of the programming control program area, and the programming control program
Ver.1.1
Control(in,out), Bulk(in,out)
Self power mode (UBPM pin = 1)
Bus power mode (UBPM pin = 0)
EP0 Control(in,out) 64 bytes
Configuration 1
InterfaceNumber 0
AlternateSetting 0
EP1 Bulk (out) 64 bytes
EP2 Bulk (in) 64 bytes
100mA
500mA
Rev. 3.0, 10/02, page 575 of 686